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CALWIRE Weather Roundup (Thursday, August 27, 2026)

By Calwire Weather Desk

  By Calwire Weather Desk

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27 active weather alerts statewide today, led by a red flag warning for Modoc County Except for the Surprise Valley, plus coverage for Death Valley National Park, Catalina and Santa Barbara Islands.

Related: CALWIRE Stock Market Open Roundup (Thursday, August 27, 2026) · CALWIRE Weather Roundup (Thursday, July 16, 2026)

RED FLAG WARNING — Modoc County Except for the Surprise Valley

Red Flag Warning issued August 27 at 12:46AM PDT until August 27 at 8:00PM PDT by NWS Medford OR

EXTREME HEAT WARNING — Death Valley National Park

Extreme Heat Warning issued August 27 at 4:52AM PDT until August 28 at 8:00PM PDT by NWS Las Vegas NV

BEACH HAZARDS STATEMENT — Catalina and Santa Barbara Islands

Beach Hazards Statement issued August 27 at 1:42AM PDT until August 27 at 11:00PM PDT by NWS Los Angeles/Oxnard CA

BEACH HAZARDS STATEMENT — San Diego County Coastal Areas

Beach Hazards Statement issued August 27 at 1:19AM PDT until August 27 at 11:00PM PDT by NWS San Diego CA

EXTREME HEAT WARNING — San Bernardino and Riverside County Valleys-The Inland Empire

Extreme Heat Warning issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

EXTREME HEAT WARNING — Apple and Lucerne Valleys

Extreme Heat Warning issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

HEAT ADVISORY — Riverside County Mountains

Heat Advisory issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

EXTREME HEAT WARNING — Orange County Inland

Extreme Heat Warning issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

EXTREME HEAT WARNING — Coachella Valley

Extreme Heat Warning issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

EXTREME HEAT WARNING — San Diego County Inland Valleys

Extreme Heat Warning issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

HEAT ADVISORY — Orange County Coastal

Heat Advisory issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

EXTREME HEAT WARNING — Santa Ana Mountains and Foothills

Extreme Heat Warning issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

HEAT ADVISORY — San Diego County Coastal Areas

Heat Advisory issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

EXTREME HEAT WARNING — San Diego County Mountains

Extreme Heat Warning issued August 27 at 12:50AM PDT until August 28 at 8:00PM PDT by NWS San Diego CA

HEAT ADVISORY — San Bernardino County Mountains

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Filed Under: Weather CALWIRE Weather Roundup Thursday