Extreme Heat Warning issued August 24 at 2:08PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

San Bernardino and Riverside County Valleys-The Inland Empire

Urgency: Expected

Certainty: Likely

Onset: 8/25/2026, 5:00:00 PM

Expires: 8/25/2026, 5:45:00 AM

Details

* WHAT...For the Heat Advisory, temperatures up to 106. For the Extreme Heat Warning, dangerously hot conditions with temperatures up to 110 expected. * WHERE...San Bernardino and Riverside County Valleys-The Inland Empire County. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Warning, from 10 AM Tuesday to 8 PM PDT Friday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Low temperatures 5 to 10 degrees above normal will limit relief from the heat. Increasing temperatures into the middle of next week will increase the threat of heat-related illness across populations.

What To Do

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Other Active Extreme Heat Warning Alerts

Extreme Heat Warning issued August 24 at 2:28PM MST until August 29 at 8:00PM MST by NWS Tucson AZ

Upper Santa Cruz River and Altar Valleys including Nogales; Upper San Pedro River Valley including Sierra Vista/Benson; Eastern Cochise County Below 5000 Feet including Douglas/Willcox

Extreme Heat Warning issued August 24 at 2:28PM MST until August 29 at 8:00PM MST by NWS Tucson AZ

Western Pima County Including Ajo/Organ Pipe Cactus National Monument; Tohono O'odham Nation including Sells; Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle; Upper Gila River and Aravaipa Valleys including Clifton/Safford

Extreme Heat Warning issued August 24 at 2:08PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

Orange County Inland

Extreme Heat Warning issued August 24 at 2:08PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

Coachella Valley; San Diego County Deserts; San Gorgonio Pass Near Banning

Extreme Heat Warning issued August 24 at 2:08PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

San Diego County Mountains

Source: National Weather Service.