California Severe Extreme Heat Watch | Effective 08/23/2026 13:54

Headline: 
Extreme Heat Watch issued August 23 at 1:54PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA
Event: 
Extreme Heat Watch
Urgency: 
Future
Effective: 
August 23, 2026 - 1:54pm
Expires: 
August 23, 2026 - 10:30pm
Description: 
* WHAT...Temperatures in the mid to upper 90s below 5000 ft MSL. * WHERE...San Bernardino County Mountains. * WHEN...For the Heat Advisory, until 10 AM PDT Tuesday. For the Extreme Heat Watch, from Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. 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
Forcast Office: 
NWS San Diego CA
Sender: 
w-nws.webmaster@noaa.gov