Lamont Bain Warns San Francisco Weather May Top Normal by 25 Degrees
San Francisco weather is heading into a week of overlapping hazards, with forecasters warning that inland parts of the Bay Area could climb into the 90s and low 100s on Wednesday. Lamont Bain, a meteorologist with the National Weather Service's Bay Area office, said the hottest day during the heat wave could run “15 to 25 degrees above normal for this time of year.”
The same stretch brings a heat advisory from noon to 11 p.m. Thursday for parts of the North Bay, East Bay, Santa Clara Valley, Sonoma coastal range, and the San Francisco Bay shoreline. Forecasters also issued a red flag warning for interior and mountain areas, while coastal flood advisories cover the shoreline during high tides.
Bay Area heat on Wednesday
Temperatures inland are forecast to climb into the 90s and low 100s on Wednesday, with rural parts of Contra Costa County near San Francisco possibly reaching 105 degrees. Bain’s forecast points to a sharp spike for people in inland neighborhoods, where the hottest period is expected to land well above seasonal levels.
Officials said extreme heat can increase the risk of dehydration, heat exhaustion, and heat stroke. They urged people to avoid strenuous outdoor activity during the hottest part of the day, check on vulnerable neighbors, and make sure pets have access to shade and water.
North Bay and East Bay advisories
The heat advisory begins at noon Thursday and runs until 11 p.m., covering parts of the North Bay, East Bay, Santa Clara Valley, Sonoma coastal range, and the San Francisco Bay shoreline. Forecasters said Friday could bring slight cooling, though inland areas may still stay hot.
The red flag warning adds another layer for interior and mountain areas, where wind gusts could reach up to 45 mph and even stronger winds are possible at the highest elevations. Officials said people in fire-prone areas should avoid anything that could spark a blaze during the warning period.
Coastal flooding and waves
Along the coast, officials issued coastal flood advisories because of high tides and warned beachgoers to watch for sneaker waves and riptides. They said sneaker waves can catch people off guard and pull them into dangerous surf, even when the ocean does not appear especially rough.
Drivers and residents in low-lying areas were told to watch for minor flooding around evening high tides. The hazards now stretch from inland heat to shoreline flooding, leaving the Bay Area with a week where different parts of the region face different risks at the same time.
