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CALWIRE Weather Roundup (Monday, August 3, 2026)
By Cal Wire Weather Desk
EXTREME HEAT WATCH — Lassen-Eastern Plumas-Eastern Sierra Counties
Extreme Heat Watch issued August 3 at 12:01AM PDT until August 9 at 8:00AM PDT by NWS Reno NV
EXTREME HEAT WATCH — Surprise Valley California
Extreme Heat Watch issued August 3 at 12:01AM PDT until August 9 at 8:00AM PDT by NWS Reno NV
HEAT ADVISORY — Surprise Valley California
Heat Advisory issued August 3 at 12:01AM PDT until August 6 at 8:00AM PDT by NWS Reno NV
HEAT ADVISORY — Lassen-Eastern Plumas-Eastern Sierra Counties
Heat Advisory issued August 3 at 12:01AM PDT until August 6 at 8:00AM PDT by NWS Reno NV
HEAT ADVISORY — Western Siskiyou County
Heat Advisory issued August 3 at 5:51AM PDT until August 6 at 11:00PM PDT by NWS Medford OR
HEAT ADVISORY — Southern Trinity
Heat Advisory issued August 3 at 5:02AM PDT until August 6 at 11:00PM PDT by NWS Eureka CA
HEAT ADVISORY — Northeastern Interior Humboldt
Heat Advisory issued August 3 at 5:02AM PDT until August 5 at 9:00PM PDT by NWS Eureka CA
HEAT ADVISORY — Interior Del Norte
Heat Advisory issued August 3 at 5:02AM PDT until August 4 at 11:00PM PDT by NWS Eureka CA
HEAT ADVISORY — Northwestern Interior Mendocino
Heat Advisory issued August 3 at 5:02AM PDT until August 4 at 11:00PM PDT by NWS Eureka CA
HEAT ADVISORY — San Luis Obispo County Interior Valleys
Heat Advisory issued August 3 at 2:45AM PDT until August 5 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
EXTREME HEAT WARNING — Northern Ventura County Mountains
Extreme Heat Warning issued August 3 at 2:45AM PDT until August 4 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
EXTREME HEAT WARNING — Cuyama Valley
Extreme Heat Warning issued August 3 at 2:45AM PDT until August 4 at 8:00PM PDT by NWS Los Angeles/Oxnard CA
HEAT ADVISORY — South-Central Shasta County Including Redding Metro
Heat Advisory issued August 3 at 1:29AM PDT until August 3 at 10:00PM PDT by NWS Sacramento CA
EXTREME HEAT WARNING — Apple and Lucerne Valleys
Extreme Heat Warning issued August 3 at 1:24AM PDT until August 5 at 8:00PM PDT by NWS San Diego CA
HEAT ADVISORY — North Bay Interior Mountains
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