California Moderate Heat Advisory | Effective 08/21/2026 12:23

Headline: 
Heat Advisory issued August 21 at 12:23PM PDT until August 24 at 8:00PM PDT by NWS San Diego CA
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
August 21, 2026 - 12:23pm
Expires: 
August 21, 2026 - 10:00pm
Description: 
* WHAT...Temperatures up to 95 expected. * WHERE...San Bernardino County Mountains. * WHEN...From 10 AM Saturday to 8 PM PDT Monday. * IMPACTS...Hot temperatures may cause heat illnesses.
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: 
San Bernardino County Mountains; Apple and Lucerne Valleys
Forcast Office: 
NWS San Diego CA
Sender: 
w-nws.webmaster@noaa.gov