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Weather / Heat Advisory

Moderate

Heat Advisory issued August 24 at 10:04PM PDT until August 25 at 10:00AM PDT by NWS San Diego CA

San Diego County Inland Valleys

Urgency: Expected
Certainty: Likely
Onset: 8/25/2026, 5:04:00 AM
Expires: 8/25/2026, 1:15:00 PM

Details

* WHAT...For the Heat Advisory, high temperatures in the 90s in the western valleys to around 105 in the far inland valleys. For the Extreme Heat Warning, dangerously hot conditions with high temperatures in he upper 90s to 109 expected. * WHERE...San Diego County Valleys 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 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
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 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 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.

Heat Advisory — San Diego County Inland Valleys | Now in USA