California Severe Extreme Heat Warning | Effective 07/31/2026 02:04

Headline: 
Extreme Heat Warning issued July 31 at 2:04AM PDT until August 2 at 8:00PM PDT by NWS San Diego CA
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
July 31, 2026 - 2:04am
Expires: 
July 31, 2026 - 3:30pm
Description: 
* WHAT...Dangerously hot conditions with high temperatures in the 90s expected. * WHERE...Santa Ana Mountains and Foothills. * WHEN...From 10 AM this morning to 8 PM PDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Area Description: 
Santa Ana Mountains and Foothills
Forcast Office: 
NWS San Diego CA
Sender: 
w-nws.webmaster@noaa.gov