California Severe Extreme Heat Warning | Effective 08/01/2026 11:28

Headline: 
Extreme Heat Warning issued August 1 at 11:28AM PDT until August 2 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
August 1, 2026 - 11:28am
Expires: 
August 2, 2026 - 8:00pm
Description: 
* WHAT...Hot daytime conditions with high temperatures between 95 and 105 common, except localized 105 to 110 in the hottest locations. Warm overnight conditions will bring less relief than usual. * WHERE...Most valleys and mountains of Los Angeles, Ventura, Santa Barbara, and San Luis Obispo Counties. * WHEN...Until 8 PM PDT Sunday. * IMPACTS...There is a high risk for dangerous heat illness, especially for sensitive groups like the very young, the very old, those without air conditioning, and those active outdoors.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Limit strenuous activities to early morning or evening hours. Take action when you see symptoms of heat exhaustion.
Area Description: 
Cuyama Valley; Santa Clarita Valley; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Santa Ynez Mountains Western Range; Santa Ynez Mountains Eastern Range; Santa Barbara County Interior Mountains; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Los Angeles County Inland Coast including Downtown Los Angeles; 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; Los Angeles County San Gabriel Valley
Forcast Office: 
NWS Los Angeles/Oxnard CA
Sender: 
w-nws.webmaster@noaa.gov