Northern California is the focus of a heat advisory issued at 10:27 a.m. on Monday by the National Weather Service. The advisory is valid from Wednesday 10 a.m. until Thursday Sept. 10, at 10 p.m.

The NWS San Francisco CA informs, “Hot conditions with temperatures of 10 to 20 degrees above degrees normal.”

“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. Hot conditions can cause heat illnesses,” according to the NWS.

The full list of affected locations includes:

Marin Coastal Range
Sonoma Coastal Range
North Bay Interior Mountains
Coastal North Bay including Point Reyes National Seashore
North Bay Interior Valleys
San Francisco Bay Shoreline
San Francisco Peninsula Coast
East Bay Interior Valleys
Santa Cruz Mountains
Santa Clara Valley Including San Jose
Eastern Santa Clara Hills
East Bay Hills
Northern Monterey Bay
Southern Monterey Bay and Big Sur Coast
Southern Salinas Valley/Arroyo Seco and Lake San Antonio
Santa Lucia Mountains and Los Padres National Forest
Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park
Northern Salinas Valley/Hollister Valley and Carmel Valley
San Francisco County


Heat safety: A guide to staying safe in high temperatures

Stay hydrated: Make sure to drink plenty of fluids.
Seek shelter: Stay indoors in an air-conditioned room to keep cool.
Avoid sun exposure: Stay out of the sun, and check up on relatives and neighbors.
Child and pet safety: Take every precaution to never leave young children and pets alone in vehicles, especially in extreme heat when car interiors can quickly become hazardous.
Caution outdoors: If you must work or spend time outdoors, take extra precautions.
Select the ideal time: Consider rescheduling strenuous activities to early morning or evening if possible.
Recognize heat-related issues: Familiarize yourself with warning signs and how to recognize the symptoms of heat exhaustion and heat stroke.
Stay cool with clothing: Wear lightweight and loose-fitting clothing to stay cool.

Additional tips for outdoor workers:

The Occupational Safety and Health Administration (OSHA) recommends frequent rest breaks in shaded or air-conditioned areas for outdoor workers.
If someone succumbs to the heat, promptly relocate them to a cool, shaded location.
In emergency situations, dial 911 for immediate assistance.

These NWS heat safety recommendations are vital for your well-being during periods of high temperatures. Stay informed and take the necessary steps to protect yourself and others from the heat’s potentially dangerous effects.

For more weather alerts in the Bay Area, visit Weather Advisories