Heat Advisory

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service San Francisco CA 914 AM PDT Tue Aug 4 2026 ...HEAT ADVISORY IN EFFECT UNTIL 10 PM PDT THIS EVENING... * WHAT...Temperatures in the 90s to low 100s. * WHERE...The Santa Clara Valley and Eastern Hills. * WHEN...Until 10 PM PDT this evening. * 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. * ADDITIONAL DETAILS...Hottest temperatures southern interior Santa Clara Valley and interior Eastern Hills. PRECAUTIONARY/PREPAREDNESS ACTIONS... Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. 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. Stay cool, stay hydrated, stay informed.