Excessive Heat Watch Issued from Saturday Morning – Tuesday Evening

Posted on August 30, 2022

Map of the Bay Area colored in maroon indicating areas to be impacted by a heat wave.

The National Weather Service has issued an excessive heat watch for the Bay Area including Sonoma and Sonoma Valley from the morning of Saturday, September 3rd through Tuesday, September 6th.

* WHAT…Dangerously hot conditions with temperatures in the upper 90s up to 110 possible, particularly across the interior. Overnight temperatures cooling only into the 60s in lower elevations and 70s to 80s in higher terrain.

* WHERE…The entire San Francisco Bay Area and Central Coast.

* WHEN…From Saturday morning through Tuesday evening.

* IMPACTS…Extreme heat will significantly increase the potential for heat related illnesses, particularly for those
working or participating in outdoor activities.

* ADDITIONAL DETAILS…The hottest temperatures will occur across the region`s interior and in the higher terrain each afternoon with mild to warm overnight temperatures providing little relief from the heat. Onshore winds and marine influences from the Pacific Ocean may limit daytime heating near the coast with afternoon highs in the 70s to 80s, ultimately reducing heat related risks.


Monitor the latest forecasts and warnings for updates on this situation. Be prepared to drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Young children and pets should never be left unattended in vehicles under any circumstances. This is especially true during warm or hot weather when car interiors can reach lethal temperatures in a matter of minutes.

More information at: weather.gov/mtr/

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