CALWIRE Weather Roundup (Tuesday, August 18, 2026)
By Cal Wire Weather Desk
3 active weather alerts statewide today, led by a extreme heat warning for Death Valley National Park, plus coverage for Cuyama Valley, Imperial County Southwest.
Related: CALWIRE Weather Roundup (Tuesday, July 14, 2026) · CALWIRE Weather Roundup (Tuesday, July 21, 2026)
EXTREME HEAT WARNING — Death Valley National Park
Extreme Heat Warning issued August 18 at 4:16AM PDT until August 21 at 8:00PM PDT by NWS Las Vegas NV
HEAT ADVISORY — Cuyama Valley
Heat Advisory issued August 18 at 1:46AM PDT until August 20 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
EXTREME HEAT WARNING — Imperial County Southwest
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