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Heat Advisory Issued: Dangerous Temperatures Expected Through Thursday

A Heat Advisory is in effect from Wednesday, October 7, at 1:59 AM PDT until Thursday, October 8, at 10:00 PM PDT, warning of dangerous temperatures up to 105 degrees across a wide area including the North Bay, East Bay, and Santa Clara Valley. Take precautions against heat exhaustion and never leave children or pets in vehicles.

Staff Writer
10/07/2026 · Monterey County edition

Residents across the Sonoma Coastal Range, North Bay, San Francisco Bay Shoreline, East Bay, Santa Cruz Mountains, and Santa Clara Valley, including San Jose, are advised to take immediate precautions due to a Heat Advisory issued by the National Weather Service (NWS) San Francisco CA.

The advisory is in effect from Wednesday, October 7, at 1:59 AM PDT until Thursday, October 8, at 10:00 PM PDT. Hot conditions are expected, with maximum temperatures ranging from the mid-90s to near 105 degrees Fahrenheit. Mild overnight temperatures and weak onshore flow will limit relief.

This level of heat can impact individuals without effective cooling or adequate hydration. The NWS warns of potential impacts on health systems, heat-sensitive industries, and infrastructure.

To stay safe, the NWS urges everyone to prioritize hydration by drinking water consistently. If possible, bring water to vulnerable individuals. When outdoors, wear lightweight and loose-fitting clothing, and limit strenuous activities to the early morning or evening hours. Recognize and act immediately on symptoms of heat exhaustion or heat stroke.

A critical safety reminder: Never leave young children or pets in unattended vehicles. Car interiors can reach lethal temperatures rapidly. Beat the heat and check the backseat.

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