NOAA/NWS · 实时热榜

* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 113. Major Heat Risk. * WHERE...In Arizona, Central La Paz, Gila River Valley, Kofa, Parker Valley, Southeast Yuma County, and Yuma. In California, Chuckwalla Valley and Palo Verde Valley. * WHEN...Until 8 PM MST /8 PM PDT/ this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...Dangerously hot conditions. Afternoon temperatures 109 to 112. Major Heat Risk. * WHERE...Buckeye/Avondale, Central Phoenix, Deer Valley, East Valley, North Phoenix/Glendale, Northwest Valley, Scottsdale/Paradise Valley, South Mountain/Ahwatukee, and Southeast Valley/Queen Creek. * WHEN...Until 8 PM MST this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, Call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 115. Major Heat Risk. * WHERE...Imperial County Southeast, Imperial County Southwest, Imperial County West, Imperial Valley, and Salton Sea. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...Dangerously hot conditions expected below 4500 feet, with daytime temperatures ranging from 95 to 105 degrees at Havasupai Gardens, 110 to 115 degrees at Phantom Ranch, and 102 to 106 at Page. * WHERE...Lower elevations of the Grand Canyon, and Marble and Glen Canyons; including Page and Phantom Ranch. * WHEN...From 9 AM MST /10 AM MDT/ this morning to 8 PM MST /9 PM MDT/ this evening. * IMPACTS...Most individuals will be at risk for heat-related illnesses without effective cooling or adequate hydration, especially with prolonged outdoor exposure. Safety instructions: This warning is reserved for only the hottest days of the year and is issued when temperatures are expected to rise to dangerous levels. Day hikers on Bright Angel Trail should descend no farther than 1 1/2 miles from the upper trailhead. Between the hours of 10 AM and 4 PM, hikers should be out of the canyon or at Havasupai Gardens or Bright Angel campgrounds, physical activity is discouraged. All hikers should have adequate gear, including a wide-brimmed hat, sunscreen, salty snacks, sufficient water, and electrolyte mix. Doubling your calorie intake helps maintain your energy. Hike smart. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an…

* AFFECTED AREA: In Central WY Fire Zones...280...283...285...288...289...300. In North Central WY Fire Zones...275...276...281...282...287. In Northwest WY Fire Zones...140...286. In Southwest WY Fire Zones...277...279. In West Central WY Fire Zone....278. * COUNTIES AFFECTED: In Central WY...Fremont...Natrona. In North Central WY...Big Horn...Hot Springs...Johnson...Park Washakie. In Northwest WY...Yellowstone National Park. In Southwest WY...Sweetwater...Uinta. In West Central WY...Lincoln...Sublette. * IMPACTS: Low Humidities...Hot Temperatures...and Strong Gusty Winds could cause erratic fire behavior. * WIND: West 10 to 20 mph with gusts up to 30 mph. * HUMIDITY: As low as 8 percent. * TEMPERATURES: Highs in the 90s in the lower elevations. Highs in the 80s in the mountains. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

* WHAT...High temperatures of 101 to 106 degrees with overnight lows of 67 to 74 degrees. Widespread Major HeatRisk with isolated Extreme HeatRisk in lower valleys. * WHERE...Western Nevada Basin and Range including Pyramid Lake. * WHEN...Until 8 AM PDT Monday. * IMPACTS...Heat related illnesses increase significantly, particularly for those working or participating in outdoor activities. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* AFFECTED AREA...Fire weather zones 417 through 433. * WIND...West to northwest winds from 15 to 25 mph with gusts up to 40 mph west of I-25, with shifting and much more variable winds expected east of I-25. * HUMIDITY...RH values between 8 and 14 percent. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 113. Major Heat Risk. * WHERE...Aguila Valley, Apache Junction/Gold Canyon, Cave Creek/New River, Fountain Hills/East Mesa, Gila Bend, Northwest Pinal County, Sonoran Desert Natl Monument, Tonopah Desert, and West Pinal County. * WHEN...Until 8 PM MST this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. * ADDITIONAL DETAILS...In Maricopa County, Call 2-1-1 to find a free cooling center, transportation, water and more. https://www.maricopa.gov/heat Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...Dangerously hot conditions. Afternoon temperatures 99 to 111. Major Heat Risk. * WHERE...Chuckwalla Mountains, Chiriaco Summit, Joshua Tree NP East, and Joshua Tree NP West. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT THIS EVENING FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 475 AND 476... * AFFECTED AREA...Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...Wind reaching these speeds and humidity drier than 15 percent can result in rapid fire spread and extreme wildfire intensity. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies.

The National Weather Service in Norman has issued a Red Flag Warning for western Oklahoma, which is in effect from 1 PM this afternoon to 9 PM CDT this evening. * WINDS...South 15 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 14 percent. * TEMPERATURES...Up to 106. * IMPACTS... * SEVERITY... FUELS (ERC)...90th+ percentile...5 (out of 5). WEATHER...Elevated...2 (out of 5). FIRE ENVIRONMENT...7 (out of 10). Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures will contribute to extreme fire behavior.

* WHAT...Dangerously hot conditions with highs of 110 to 115 in the Las Vegas Valley, Pahrump, Moapa Valley, and the Colorado River Valley, and up to 120 in Death Valley. Warm overnight temperatures will result in little relief overnight. * WHERE...Lake Mohave, Lake Mead, Lower Colorado River Valley / Lake Havasu, Death Valley National Park, Northeast Clark County, Western Clark and Southern Nye County, and Las Vegas Valley. * WHEN...Until 8 PM PDT /8 PM MST/ Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates.

* WHAT...Dangerously hot conditions with highs 110 to 120 degrees across the Mojave Desert. Highs 95 to 105 degrees across most of the southern Great Basin and Arizona Strip. Little to no overnight relief is expected, particularly in the Mojave Desert where lows of 80 to 95 degrees are forecast. This will result in Major-to-Extreme Heat Risk. * WHERE...Portions of northwest Arizona, southeast California, and south central and southern Nevada. * WHEN...Until 8 PM PDT /8 PM MST/ this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates.

...BREEZY WESTERLY WINDS AND LOW RELATIVE HUMIDITY CONTINUE TODAY THROUGH THE CASCADE GAPS AND INTO THE COLUMBIA BASIN... .Breezy westerly winds through the Cascade gaps will likely (80% chance) overlap with low relative humidity and generate Red Flag conditions continue this afternoon and evening. * AFFECTED AREA...Fire Weather Zone 690 Kittitas Valley. * TIMING...Until 11 PM PDT this evening. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 18 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

...BREEZY WESTERLY WINDS AND LOW RELATIVE HUMIDITY CONTINUE TODAY THROUGH THE CASCADE GAPS AND INTO THE COLUMBIA BASIN... .Breezy westerly winds through the Cascade gaps will likely (80% chance) overlap with low relative humidity and generate Red Flag conditions continue this afternoon and evening. * AFFECTED AREA...Fire Weather Zones 691 Lower Columbia Basin of Oregon and 691 Lower Columbia Basin of Washington. * TIMING...Until 11 PM PDT this evening. * WINDS...West 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 16 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

* WHAT...Dangerously hot conditions with temperatures of 100 to 107 expected. * WHERE...Apple and Lucerne Valleys. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with high temperatures of mid 100s to around 112 expected. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT this evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

...BREEZY WESTERLY WINDS AND LOW RELATIVE HUMIDITY CONTINUE TODAY THROUGH THE CASCADE GAPS AND INTO THE COLUMBIA BASIN... .Breezy westerly winds through the Cascade gaps will likely (80% chance) overlap with low relative humidity and generate Red Flag conditions continue this afternoon and evening. * AFFECTED AREA...Fire Weather Zones 701 Eastern Columbia River Gorge of Oregon and 703 Warm Springs Reservation. * TIMING...Until 11 PM PDT this evening. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 17 percent. * IMPACTS...Any fire that develops will catch and spread quickly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

* WHAT...The Heat Advisory has been replaced with an Extreme Heat Warning. High temperatures up to 108 degrees and multiple days of Major Heat Risk. * WHERE...San Joaquin Valley and adjacent foothills, Lake Isabella, and the Kern River Valley. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...Afternoon high temperatures of 105 to 109 degrees will occur daily through Monday. Overnight lows will generally only fall into the mid 60s to mid 70s with little overnight relief. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed. If you do not have air conditioning in your home or lack shelter, seek out resources provided by your local community management.

* WHAT...The Heat Advisory has been replaced with an Extreme Heat Warning. High temperatures of 105 to 110 degrees and multiple days of Major Heat Risk. Hottest temperatures expected on Sunday. * WHERE...San Joaquin Valley and adjacent foothills, Lake Isabella, and the Kern River Valley. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...Afternoon high temperatures of 105 to 110 degrees will occur daily through this weekend into Monday. Overnight lows will generally only fall into the mid 60s to mid 70s with little overnight relief. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with multiple days of Major to Extreme Heat Risk. * WHERE...San Joaquin Valley and adjacent foothills, Lake Isabella, and the Kern River Valley. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially those with little overnight relief from the heat. * ADDITIONAL DETAILS...Dangerously hot conditions with high temperatures up to 112 degrees. Overnight lows will range from 75-80 degrees. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed. If you do not have air conditioning in your home or lack shelter, seek out resources provided by your local community management.

* WHAT...Dangerously hot conditions with highs 110 to 120 degrees across the Mojave Desert. Highs 95 to 105 degrees across most of the southern Great Basin and Arizona Strip. Little to no overnight relief is expected, particularly in the Mojave Desert where lows of 80 to 95 degrees are forecast. This will result in Major-to-Extreme Heat Risk. * WHERE...Portions of northwest Arizona, southeast California, and south central and southern Nevada. * WHEN...Until 8 PM PDT /8 PM MST/ Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates.

* WHAT...Dangerously hot conditions with heat index values up to 109 expected. * WHERE...Portions of south central and southwest Illinois and central and east central Missouri. * WHEN...From noon today to 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances. Take extra precautions if you work or spend time outside. When possible reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose fitting clothing when possible. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. People in the Saint Louis Metropolitan Area can get information about cooling centers or energy assistance related to the excessive heat by calling the United Way of Greater Saint Louis at 800-427-4626, or if calling from a land line phone dial 2-1-1. You can also call Cool Down Saint Louis at 314-241-7668.

* AFFECTED AREA...Fire weather zones 417 through 433. * WIND...Saturday west to northwest winds from 15 to 25 mph with gusts up to 40 mph. Overnight, lighter variable winds of 5 to 10 mph. Sunday west to northwest winds from 15 to 25 mph with gusts up to 40 mph west of I-25, with winds turning southerly to easterly east of I-25. * HUMIDITY...Daytime minimum RH between 5 and 10 percent on Saturday, and between 8 and 12 percent on Sunday. Overnight recoveries of 20 to 40 percent along and west of Interstate 25 and 40 to 60 percent in Niobrara and Goshen Counties. * ADDITIONAL DETAILS...Isolated high-based showers will have the potential to produce gusty and erratic winds along with a few strikes of lightning without much, if any, rainfall during the afternoon and evening hours both Saturday and Sunday. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

* WHAT...Dangerously hot conditions with daily maximum heat index values around 105 expected. Overnight low temperatures will remain in the upper 70s to lower 80s. * WHERE...Portions of southeast Kansas and central, southwest, and west central Missouri. * WHEN...From noon today to 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

* WHAT...The Heat Advisory has been replaced with an Extreme Heat Warning. High temperatures up to 108 degrees and multiple days of Major Heat Risk. * WHERE...West Side Mountains north of 198. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The Heat Advisory has been replaced with an Extreme Heat Warning. Afternoon high temperatures of 105 to 109 degrees will occur daily through Monday. Overnight lows will generally only fall into the mid 60s to mid 70s with little overnight relief. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...The Heat Advisory has been replaced with an Extreme Heat Warning. High temperatures of 105 to 110 degrees and multiple days of Major Heat Risk. Hottest temperatures expected on Sunday. * WHERE...San Joaquin Valley and adjacent foothills, Lake Isabella, and the Kern River Valley. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...The Heat Advisory has been replaced with an Extreme Heat Warning. Afternoon high temperatures of 105 to 110 degrees will occur daily through this weekend into Monday. Overnight lows will generally only fall into the mid 60s to mid 70s with little overnight relief. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* Affected Area: East Washington Central Cascades (Zone 696), East Portion of North Cascades National Park/Lake Chelan National Recreation Area (Zone 697) and East Washington North Cascades (Zone 698). * Winds: Northwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidities: 12 to 24 percent in the valleys and 24 to 37 percent over the higher terrain. * Impacts: Rapid fire spread is possible with any new or ongoing fires. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior.

...The Flood Warning continues for the following rivers in Texas... Nueces River Near Tilden affecting McMullen County. * WHAT...Minor flooding is occurring. * WHERE...Nueces River near Tilden. * WHEN...Until Sunday afternoon. * IMPACTS...At 14.0 feet, Minor lowland flooding occurs, and causes sloughs and peripheral channels near the main stream to cut off areas of the flood plain, isolating livestock and damaging equipment in low areas. Oil field tank batteries and pump jacks flood. * ADDITIONAL DETAILS... - At 7:30 PM CDT Saturday the stage was 14.3 feet. - Bankfull stage is 11.0 feet. - Forecast...The river is expected to fall below flood stage tonight and fall below action stage by late Monday. - Flood stage is 14.0 feet. - Flood History...This crest compares to a previous crest of 14.3 feet on 05/24/2004. - http://www.weather.gov/safety/flood Safety instructions: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Motorists should not attempt to drive around barricades or drive cars through flooded areas. Caution is urged when walking near riverbanks. Even 6 inches of fast-moving flood water can knock you off your feet and a depth of 2 feet will float your car. Never try to walk, swim, or drive through such swift water. If you come upon flood waters, stop, turn around and go another way. Additional information is available at www.weather.gov/crp.

* WHAT...Dangerously hot conditions with temperatures up to 100 with little overnight relief. * WHERE...Great Salt Lake Desert and Mountains, Northern Wasatch Front, Salt Lake Valley, and Tooele and Rush Valleys. * WHEN...Until midnight MDT Sunday Night. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

* WHAT...Dangerously hot conditions with multiple days of Major to Extreme Heat Risk. * WHERE...Indian Wells Valley, Mojave Desert, and Mojave Desert Slopes. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events, especially those with little overnight relief from the heat. * ADDITIONAL DETAILS...Dangerously hot conditions with high temperatures up to 112 degrees. Overnight lows will range from 75-80 degrees. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed. If you do not have air conditioning in your home or lack shelter, seek out resources provided by your local community management.

The National Weather Service in Pocatello has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from noon to 9 PM MDT Sunday. * AFFECTED AREA...Fire Weather Zone 475 East Salmon River Mountains/Salmon NF and Fire Weather Zone 476 Lemhi and Lost River Range/Challis NF. * WINDS...West 5 to 15 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...As low as 12 percent. * IMPACTS...Wind reaching these speeds and humidity drier than 15 percent can result in rapid fire spread and extreme wildfire intensity. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly based on these criteria for Southeastern Idaho: - Relative humidity at or below 15 percent and wind gusts of at least 25 mph in the mountains, or 30 mph in the Snake Plain. - Thunderstorm coverage of 25 percent, without specific rainfall criteria. - Other high impact events deemed critical by the National Weather Service and area fire management agencies.

FFWCLE The National Weather Service in Cleveland has issued a * Flash Flood Warning for... Northeastern Crawford County in northwestern Pennsylvania... Southeastern Erie County in northwestern Pennsylvania... * Until 1230 AM EDT. * At 838 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1.5 and 2.5 inches of rain have fallen. Additional rainfall amounts of 0.5 to 1.5 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Edinboro, Cambridge Springs, Canadohta Lake, Lincolnville, Riceville, Mill Village and Spartansburg. Safety instructions: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

* WHAT...Dangerously hot conditions with temperatures up to 109 with little overnight recovery. * WHERE...Glen Canyon Recreation Area/Lake Powell, Lower Washington County, and Zion National Park. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

The Extreme Heat Watch has been replaced. Please see the latest information from NWS Springfield MO on this developing situation. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

...The National Weather Service in Nashville has issued a Flood Warning for the following rivers in Tennessee... Mill Creek Near Nolensville affecting Davidson County. * WHAT...Flooding due to heavy rainfall. * WHERE...Mill Creek near Nolensville. * WHEN...From this evening to late tonight. * ADDITIONAL DETAILS... - At 7:00 PM CDT Saturday the stage was 10.8 feet. - Forecast...No forecast is available for this location. - Flood stage is 13.0 feet. - Flood History...This crest compares to a previous crest of 10.7 feet on 01/11/2012. - http://www.weather.gov/safety/flood Safety instructions: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding. Additional information is available at www.weather.gov. The next statement will be issued late tonight at 400 AM CDT.

* WHAT...Dangerously hot conditions. Afternoon temperatures 100 to 113. Major Heat Risk. * WHERE...Chuckwalla Mountains, Chiriaco Summit, and Joshua Tree National Park. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Overexposure can cause heat cramps and heat exhaustion to develop and, without intervention, can lead to heat stroke. Safety instructions: An Extreme Heat Warning means that a period of very hot temperatures, even by local standards, will occur. Actions should be taken to lessen the impact of the extreme heat. Take extra precautions if you work or spend time outside. When possible, reschedule strenuous activities to early morning or evening. Know the signs and symptoms of heat exhaustion and heat stroke. Wear lightweight and loose-fitting clothing when possible and drink plenty of water. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Public cooling shelters are available in some areas. Consult county officials for more details.

* WHAT...High temperatures 100 to 105 degrees in the valleys each afternoon. Low temperatures 73 to 78 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...Southeastern Elko County. * WHEN...Until 11 PM PDT Monday. * IMPACTS...Heat-related illnesses increase significantly during extreme heat events. Safety instructions: Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Drink plenty of fluids, remain in an air-conditioned room, stay out of the sun, and check on relatives and neighbors.

SEVERE THUNDERSTORM WATCH 545 REMAINS VALID UNTIL 7 AM CDT THIS MORNING FOR THE FOLLOWING AREAS IN SOUTH DAKOTA THIS WATCH INCLUDES 3 COUNTIES IN EAST CENTRAL SOUTH DAKOTA BEADLE BROOKINGS KINGSBURY THIS INCLUDES THE CITIES OF ARLINGTON, BROOKINGS, DE SMET, HURON, AND LAKE PRESTON.

* WHAT...High temperatures 100 to 105 degrees in the valleys each afternoon. Low temperatures 62 to 70 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...Northern Lander and Northern Eureka, Southern Lander and Southern Eureka, Southwest Elko, Northeastern Nye, and Northwestern Nye Counties. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MDT SUNDAY DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR SOUTHERN CAMPBELL AND WESTON COUNTY PLAINS... * AFFECTED AREA...Fire Weather Zones 315 and 317. * TIMING...From noon to 8 PM MDT Sunday. * WINDS...Northwest winds 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...Relative Humidity as low as 10 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. Safety instructions: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

THE NATIONAL WEATHER SERVICE HAS ISSUED SEVERE THUNDERSTORM WATCH 545 IN EFFECT UNTIL 7 AM CDT SUNDAY FOR THE FOLLOWING AREAS IN MINNESOTA THIS WATCH INCLUDES 2 COUNTIES IN WEST CENTRAL MINNESOTA BIG STONE TRAVERSE IN SOUTH DAKOTA THIS WATCH INCLUDES 20 COUNTIES IN CENTRAL SOUTH DAKOTA HAND HUGHES HYDE SULLY IN NORTH CENTRAL SOUTH DAKOTA CAMPBELL EDMUNDS FAULK MCPHERSON POTTER WALWORTH IN NORTHEAST SOUTH DAKOTA BROWN CLARK CODINGTON DAY DEUEL GRANT HAMLIN MARSHALL ROBERTS SPINK THIS INCLUDES THE CITIES OF ABERDEEN, BRITTON, CLARK, CLEAR LAKE, EUREKA, FAULKTON, GETTYSBURG, HAYTI, HERREID, HIGHMORE, IPSWICH, MILBANK, MILLER, MOBRIDGE, ONIDA, ORTONVILLE, PIERRE, REDFIELD, SISSETON, WATERTOWN, WEBSTER, AND WHEATON.

* WHAT...High temperatures 100 to 103 degrees in the valleys each afternoon. Low temperatures 60 to 65 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...Humboldt County. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

* WHAT...Dangerously hot conditions with heat index values up to 107 expected. * WHERE...In Kansas, Linn KS and Miami Counties. In Missouri, Cooper, Howard, Pettis, Saline, Bates, Cass, Henry, and Johnson MO Counties. * WHEN...From noon today to 8 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...High temperatures 100 to 105 degrees in the valleys each afternoon. Low temperatures 73 to 78 degrees in the valleys each night. This will result in a major risk for heat-related illnesses for much of the population, especially those without effective cooling. * WHERE...South Central Elko County. * WHEN...Until 11 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. Safety instructions: Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

FFWDMX The National Weather Service in Des Moines has issued a * Flash Flood Warning for... Northwestern Webster County in central Iowa... * Until noon CDT Sunday. * At 548 AM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 3 and 4 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Western portions of Fort Dodge, Lizard Creek, and Clare. Safety instructions: For the latest stream observations and forecasts refer to weather.gov/desmoines/water. Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

* WHAT...Dangerously hot conditions with temperatures of 100 to 110 expected. * WHERE...Apple and Lucerne Valleys. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with high temperatures of mid 100s to low 110s expected. * WHERE...Coachella Valley, San Diego County Deserts, and San Gorgonio Pass near Banning. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

* WHAT...Dangerously hot conditions with heat index values up to 107 possible. * WHERE...In Kansas, Linn KS and Miami Counties. In Missouri, Cooper, Howard, Pettis, Saline, Bates, Cass, Henry, and Johnson MO Counties. * WHEN...From Sunday afternoon through Wednesday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Safety instructions: Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

FFWOHX The National Weather Service in Nashville has issued a * Flash Flood Warning for... Southeastern Williamson County in Middle Tennessee... * Until 815 PM CDT. * At 513 PM CDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1 and 3 inches of rain have fallen. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Spring Hill, Nolensville and Thompson's Station. Safety instructions: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.