Heat Advisory

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service San Francisco CA 625 AM PDT Thu Aug 21 2025 ...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 10 PM PDT THIS EVENING... * WHAT...Temperatures in the 80s to the middle 90s expected near the Bay and 90s to near 100 degrees interior North Bay. * WHERE...North Bay Interior Valleys and San Francisco Bay Shoreline. * WHEN...From 10 AM this morning to 10 PM PDT this evening. * IMPACTS...Hot conditions can cause heat illnesses. 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. PRECAUTIONARY/PREPAREDNESS ACTIONS... Hydration is a critical piece to surviving the heat. Drink water, and if possible, take water to those who are vulnerable. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. 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.