Heat Advisory

Locations Affected

San Jose, CA ∙ Oakland, CA ∙ San Francisco, CA ∙ Fremont, CA ∙ Hayward, CA ∙ Santa Rosa, CA ∙ Salinas, CA ∙ Sunnyvale, CA ∙ Berkeley, CA ∙ Santa Clara, CA

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service San Francisco CA 115 PM PDT Tue Sep 8 2026 ...HEAT ADVISORY NOW IN EFFECT UNTIL 10 PM PDT THURSDAY... * WHAT...Hot conditions with temperatures 10 to 20 degrees above normal during the day, with overnight lows also running 10 to 20 degrees above normal. * WHERE...Bay Area and Central Coast. * WHEN...Until 10 PM PDT Thursday. * IMPACTS...This level of heat affects most individuals sensitive to heat, especially those without effective cooling and/or adequate hydration. Impacts possible in some health systems and in heat-sensitive industries. Hot conditions can cause heat illnesses. 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. Beat the heat and check the backseat! Do not leave young children or pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

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