CALWIRE Weather Roundup (Thursday, August 20, 2026)

By Cal Wire Weather Desk

  By Cal Wire Weather Desk

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6 active weather alerts statewide today, led by a fire weather watch for Central Siskiyou County Including Shasta Valley, plus coverage for Death Valley National Park, Imperial County Southwest.

FIRE WEATHER WATCH — Central Siskiyou County Including Shasta Valley

Fire Weather Watch issued August 20 at 1:40AM PDT until August 21 at 9:00PM PDT by NWS Medford OR

EXTREME HEAT WARNING — Death Valley National Park

Extreme Heat Warning issued August 20 at 4:57AM PDT until August 21 at 8:00PM PDT by NWS Las Vegas NV

EXTREME HEAT WARNING — Imperial County Southwest

Extreme Heat Warning issued August 20 at 2:30AM MST until August 23 at 8:00PM MST by NWS Phoenix AZ

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

Heat Advisory issued August 20 at 1:31AM PDT until August 20 at 8:00PM PDT by NWS San Diego CA

HEAT ADVISORY — Cuyama Valley

Heat Advisory issued August 20 at 1:31AM PDT until August 20 at 8:00PM PDT by NWS Los Angeles/Oxnard CA

EXTREME HEAT WARNING — Coachella Valley

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Filed Under: Weather CALWIRE Weather Roundup Thursday