Heat Advisory Extended Through Tuesday Morning; Extreme Heat Watch Continues Through Friday
The National Weather Service has extended the heat advisory for Southern California until 10 a.m. Tuesday, with an extreme heat watch now in effect through Friday evening.
4 reports on this incident · first at Aug 22, 2026, 4:20 p.m. ET
Earlier reports
Aug 22, 2026, 4:53 p.m. ET
Heat Advisory and Extreme Heat Watch Issued for Southern California
The National Weather Service in San Diego has issued a Heat Advisory and an Extreme Heat Watch for parts of Southern California, according to an official record. The advisory is in effect until 10 AM PDT Tuesday, August 25, and the watch begins Tuesday morning and lasts through Friday evening, August 28.
The affected areas include Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys (the Inland Empire), San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills. Temperatures are forecast to reach 90 to 97 degrees in Inland Orange County, 90 to 102 in San Diego County Valleys, 98 to 106 in the Inland Empire, and 89 to 100 in the mountains. Temperatures are expected to increase a few more degrees into the middle and end of next week, making for a prolonged and dangerous stretch of heat.
The National Weather Service warns that hot temperatures may cause heat illnesses, and recommends drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking up on relatives and neighbors.
Aug 22, 2026, 4:24 p.m. ET
Extreme Heat Watch for Southern California Valleys and Mountains Starts Tuesday
The National Weather Service San Diego CA warns that heat-related illnesses increase significantly during extreme heat events, and that hot temperatures may cause heat illnesses. The warning accompanies a Heat Advisory and Extreme Heat Watch issued for parts of Southern California.
The Heat Advisory is in effect until 10 AM PDT Tuesday, August 25, 2026. The Extreme Heat Watch begins at 10 AM PDT Tuesday, August 25, 2026, and runs through Friday evening, August 28, 2026. The advisory and watch cover Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys-The Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills.
Temperatures are forecast to reach 90 to 97 degrees for Inland Orange County, 90 to 102 for the San Diego County Valleys, 98 to 106 for the Inland Empire, and 89 to 100 in the mountains. Temperatures are expected to increase another few degrees into the middle and end of next week, making for a prolonged and dangerous stretch of heat.
The Weather Service advises drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking up on relatives and neighbors.
Aug 22, 2026, 4:20 p.m. ETFirst report
Heat Advisory and Extreme Heat Watch Issued for Southern California
The National Weather Service in San Diego has issued a Heat Advisory and an Extreme Heat Watch for parts of Southern California, effective from August 25 through August 28, 2026. The advisory is in effect until 10 AM PDT Tuesday, while the watch begins Tuesday morning and lasts through Friday evening.
Temperatures are forecast to reach 90 to 97 degrees in Inland Orange County, 90 to 102 in the San Diego County Valleys, 98 to 106 in the Inland Empire, and 89 to 100 in the mountains. According to the National Weather Service, temperatures will increase a few more degrees into the middle and end of next week, making for a prolonged and dangerous stretch of heat.
The affected areas include Orange County Inland Areas, Riverside County Mountains, San Bernardino and Riverside County Valleys, the Inland Empire, San Diego County Mountains, San Diego County Valleys, and Santa Ana Mountains and Foothills. The National Weather Service advises residents to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check on relatives and neighbors, as heat-related illnesses increase significantly during extreme heat events.
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