Expected

Responsive action SHOULD be taken soon (within next hour)

California Severe Extreme Heat Warning | Effective 08/09/2026 11:13

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 113. Major Heat Risk. * WHERE...Imperial County, including the Imperial Valley and El Centro. * 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. An Extreme Heat Warning means that a period of very hot temperatures,

Arizona Severe Extreme Heat Warning | Effective 08/09/2026 11:13

* WHAT...Dangerously hot conditions. Afternoon temperatures 109 to 112. Major Heat Risk. * WHERE...The Phoenix metropolitan area. * 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.

Arizona Severe Extreme Heat Warning | Effective 08/09/2026 11:13

* WHAT...Dangerously hot conditions. Afternoon temperatures 107 to 113. Major Heat Risk. * WHERE...In Arizona, La Paz and Yuma counties. In California, Palo Verde Valley. * 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. An Extreme Heat Warning means that a period of very hot temperatures,

California Severe Extreme Heat Warning | Effective 08/09/2026 11:13

* WHAT...Dangerously hot conditions. Afternoon temperatures 99 to 111. Major Heat Risk. * WHERE...Chuckwalla Mountains, Chiriaco Summit, and Joshua Tree National Park. * 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. An Extreme Heat Warning means that a period of very hot temperatures,

Arizona Severe Extreme Heat Warning | Effective 08/09/2026 11:13

* WHAT...Dangerously hot conditions. Afternoon temperatures 106 to 113. Major Heat Risk. * WHERE...Portions of Maricopa and Northern Pinal counties * 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.

Wyoming Severe Red Flag Warning | Effective 08/09/2026 10:49

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING DUE TO GUSTY WINDS AND LOW RELATIVE HUMIDITY FOR SOUTHERN CAMPBELL AND WESTON COUNTY PLAINS... * AFFECTED AREA...Fire Weather Zones 315 and 317. * TIMING...Until 8 PM MDT this evening. * 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. A Red Flag Warning means that critical fire weather conditions are

California Severe Extreme Heat Warning | Effective 08/09/2026 10:02

* WHAT...Dangerously hot conditions with multiple days of Major to Extreme Heat Risk. Highs 106 to 112 degrees. * 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 to 80 degrees.

California Severe Extreme Heat Warning | Effective 08/09/2026 10:02

* WHAT...High temperatures up to 110 degrees and Major Heat Risk today and Monday. * WHERE...Mariposa-Madera Lower Sierra. Includes Mariposa, North Fork, Oakhurst, Coarsegold, and El Portal. * WHEN...Until 8 PM PDT Monday. * IMPACTS...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...Afternoon high temperatures of 102 to 110 degrees will occur until Monday, with the hottest temperatures expected today and mainly for elevations around 3,000 feet and

California Severe Extreme Heat Warning | Effective 08/09/2026 10:02

* WHAT...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...Hot temperatures and limited overnight relief may cause heat illnesses. * ADDITIONAL DETAILS...Afternoon high temperatures of 102 to 108 degrees will occur through Monday. Overnight lows will generally only fall into the mid 60s to mid 70s with little overnight relief. Drink plenty of fluids, stay in an air-conditioned room, stay out of

California Severe Extreme Heat Warning | Effective 08/09/2026 10:02

* 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 today. * 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 and high humidity events. * ADDITIONAL DETAILS...Afternoon high temperatures of 105 to 110
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