Weather / Heat Advisory
Moderate
Heat Advisory issued August 24 at 10:04PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA
Riverside County Mountains
Urgency: Expected
Certainty: Likely
Onset: 8/25/2026, 5:04:00 AM
Expires: 8/25/2026, 1:15:00 PM
Details
* WHAT...High temperatures in the 90s to low 100s expected. * WHERE...Riverside County Mountains County. * WHEN...Until 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 Heat Advisory Alerts
Heat Advisory issued August 25 at 12:02AM PDT until August 25 at 10:00AM PDT by NWS Los Angeles/Oxnard CA
Cuyama Valley
Heat Advisory issued August 25 at 12:02AM PDT until August 27 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
San Luis Obispo County Inland Central Coast; Santa Barbara County Inland Central Coast; Santa Ynez Valley
Heat Advisory issued August 25 at 12:02AM PDT until August 25 at 10:00AM PDT by NWS Los Angeles/Oxnard CA
Catalina and Santa Barbara Islands; Santa Barbara County Southwestern Coast; Santa Barbara County Southeastern Coast; Ventura County Beaches; Ventura County Inland Coast; Malibu Coast; Los Angeles County Beaches; Palos Verdes Hills; Los Angeles County Inland Coast including Downtown Los Angeles
Heat Advisory issued August 25 at 12:02AM PDT until August 25 at 10:00AM PDT by NWS Los Angeles/Oxnard CA
Santa Clarita Valley; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Southeastern Ventura County Valleys; Santa Susana Mountains; Southern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Los Angeles County San Gabriel Valley
Heat Advisory issued August 25 at 12:02AM PDT until August 28 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Santa Lucia Mountains; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains
Source: National Weather Service.