Weather / Heat Advisory
Moderate
Heat Advisory issued August 24 at 2:08PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA
San Bernardino County Mountains
Urgency: Expected
Certainty: Likely
Onset: 8/24/2026, 9:08:00 PM
Expires: 8/25/2026, 5:45:00 AM
Details
* WHAT...Temperatures in the mid to upper 90s below 5000 ft MSL. * WHERE...San Bernardino County Mountains below 6000 ft. * WHEN...Until 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 24 at 2:08PM PDT until August 25 at 10:00AM PDT by NWS San Diego CA
San Diego County Inland Valleys
Heat Advisory issued August 24 at 2:08PM PDT until August 25 at 10:00AM PDT by NWS San Diego CA
San Diego County Mountains
Heat Advisory issued August 24 at 2:08PM PDT until August 28 at 8:00PM PDT by NWS San Diego CA
Riverside County Mountains
Heat Advisory issued August 24 at 2:08PM PDT until August 25 at 10:00AM PDT by NWS San Diego CA
San Bernardino and Riverside County Valleys-The Inland Empire
Heat Advisory issued August 24 at 2:08PM PDT until August 25 at 10:00AM PDT by NWS San Diego CA
Santa Ana Mountains and Foothills
Source: National Weather Service.