Heat advisory for Northern California for Tuesday

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The NWS San Francisco CA issued a heat advisory at 10:49 a.m. on Monday valid for Tuesday between 10 a.m. and 10 p.m. The advisory is for Sonoma Coastal Range, North Bay Interior Mountains, North Bay Interior Valleys, East Bay Interior Valleys, Santa Clara Valley Including San Jose, Eastern Santa Clara Hills, East Bay Hills and Northern Salinas Valley/Hollister Valley and Carmel Valley.

"Widespread high temperatures in the 90s with hotspots reaching the low 100s," can be anticipated according to the NWS. "Widespread Moderate HeatRisk in the upper 90s with favored hotspots reaching the low 100s on Tuesday. Limited overnight recovery is expected with overnight lows only dropping into the low to mid 60s. Higher elevations may only see overnight lows drop into the upper 60s to mid 70s."

"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," says the NWS.

This advisory is in effect until Tuesday at 10 p.m.

NWS Heat Wave Safety Tips: Stay safe with these recommendations

• Stay hydrated: Drink plenty of fluids.
• Seek cool shelter: Opt for an air-conditioned room to stay comfortable.
• Stay out of the sun, and check up on relatives and neighbors.
• Protect your little ones and furry friends: Never leave young children and pets alone in vehicles, especially during hot weather when car interiors can become dangerously hot in a matter of minutes.
• Take extra precautions outdoors: If you work or spend time outside, be sure to take additional safety measures.
• Time your activities wisely: If possible, reschedule strenuous activities to early morning or evening when the heat is less intense.
• Know the red flags: Understand the signs and symptoms of heat exhaustion and heat stroke.
• Stay cool with clothing: Select lightweight and loose-fitting outfits for enhanced comfort.

For a safer outdoor work environment, follow the Occupational Safety and Health Administration (OSHA)'s guidance by scheduling regular rest breaks in shaded or air-conditioned places. If anyone shows signs of heat illness, promptly move them to a cool, shaded area. In an emergency, call 911.

Source: The National Weather Service

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This story was originally published July 13, 2026 at 10:54 AM.