Heat Advisory in Northern California Until Wednesday
A heat advisory is currently active for Northern California, issued by the National Weather Service (NWS) on Sunday, October 4, 2026, at 11:01 p.m. The advisory will remain in effect until Wednesday, October 7, at 10 p.m. Temperatures are expected to range from the mid-90s to low-100s °F (35-38 °C) during the day, with mild overnight lows due to weak onshore flow. Affected areas include the Sonoma Coastal Range, North Bay Interior Valleys, San Francisco Bay Shoreline, and Santa Clara Valley, among others. The NWS warns that these conditions could pose risks to individuals without access to cooling or adequate hydration.
