Heat Advisory

Locations Affected

San Jose, CA ∙ Fremont, CA ∙ Oakland, CA ∙ Santa Rosa, CA ∙ Hayward, CA ∙ Sunnyvale, CA ∙ Daly City, CA ∙ Santa Clara, CA ∙ Antioch, CA ∙ San Mateo, CA

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service San Francisco CA 226 AM PDT Tue Oct 6 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 10 PM PDT THURSDAY... * WHAT...Hot conditions with maximum temperatures in the mid-90s to near 105. Mild minimum temperatures and weak onshore flow will limit overnight relief. * WHERE...The East Bay and San Francisco Bay Shoreline, North Bay Interior Mountains and Valleys, The Santa Clara Valley and Eastern Hills, The Santa Cruz Mountains, Interior Monterey County and the Santa Lucia Range, Most of San Benito County and the Cholame Hills in Southeast Monterey County, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...Until 10 PM PDT Thursday. * IMPACTS...This level of heat affects anyone without effective cooling and/or adequate hydration. Impacts likely in some health systems, heat-sensitive industries and infrastructure. PRECAUTIONARY/PREPAREDNESS ACTIONS... Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to the early morning or evening. Take action when you experience symptoms of heat exhaustion and/or heat stroke.

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