CALWIRE Weather Roundup (Wednesday, September 9, 2026)
By Calwire Weather Desk
26 active weather alerts statewide today, led by a extreme heat warning for Death Valley National Park, plus coverage for San Diego County Inland Valleys, San Diego County Coastal Areas.
Related: CALWIRE Weather Roundup (Wednesday, July 15, 2026) · CALWIRE Weather Roundup (Wednesday, July 22, 2026)
EXTREME HEAT WARNING — Death Valley National Park
Extreme Heat Warning issued September 9 at 4:24AM PDT until September 10 at 8:00PM PDT by NWS Las Vegas NV
HEAT ADVISORY — San Diego County Inland Valleys
Heat Advisory issued September 9 at 2:58AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
HEAT ADVISORY — San Diego County Coastal Areas
Heat Advisory issued September 9 at 2:58AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
HEAT ADVISORY — San Bernardino and Riverside County Valleys-The Inland Empire
Heat Advisory issued September 9 at 2:58AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
HEAT ADVISORY — Santa Ana Mountains and Foothills
Heat Advisory issued September 9 at 2:58AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
HEAT ADVISORY — Orange County Inland
Heat Advisory issued September 9 at 2:58AM PDT until September 10 at 8:00PM PDT by NWS San Diego CA
EXTREME HEAT WARNING — Palo Verde Valley
Extreme Heat Warning issued September 9 at 4:22AM MST until September 11 at 8:00PM MST by NWS Phoenix AZ
HEAT ADVISORY — West Side Mountains north of 198
Heat Advisory issued September 9 at 3:31AM PDT until September 10 at 10:00PM PDT by NWS Hanford CA
EXTREME HEAT WARNING — Coachella Valley
Extreme Heat Warning issued September 9 at 2:58AM PDT until September 11 at 8:00PM PDT by NWS San Diego CA
HEAT ADVISORY — Sierra Nevada of Tehama-Butte-Plumas Counties Between 1000-3000 ft
Heat Advisory issued September 8 at 11:30AM PDT until September 10 at 10:00PM PDT by NWS Sacramento CA
EXTREME HEAT WARNING — Cuyama Valley
Extreme Heat Warning issued September 9 at 1:11AM PDT until September 10 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
EXTREME HEAT WARNING — Malibu Coast
Extreme Heat Warning issued September 9 at 1:11AM PDT until September 10 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
EXTREME HEAT WARNING — Catalina and Santa Barbara Islands
Extreme Heat Warning issued September 9 at 1:11AM PDT until September 10 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
EXTREME HEAT WARNING — Imperial County Southwest
Extreme Heat Warning issued September 9 at 4:22AM MST until September 11 at 8:00PM MST by NWS Phoenix AZ
HEAT ADVISORY — San Francisco
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