'Dangerous, Life Threatening Heat' To Hit Bay Area Tuesday

SAN FRANCISCO — The Bay Area is expected to face "dangerous, life threatening heat" Tuesday and Wednesday, according to the National Weather Service, which urged residents to take precautions to keep cool and stay safe amid extreme temperatures.

Tuesday could be the hottest day San Francisco has seen so far this year and the weather inland is forecast to be far hotter, with temperatures as high as 113 degrees, according to the weather service.

“Hot conditions could cause life-threatening impacts or major impacts to commerce or travel,” according to the service. “Prepare for dangerous heat, limit outdoor activities.”

There is an excessive heat warning in place until 11 p.m. Wednesday for the North Bay interior and coastal ranges, the East and South bays, the Santa Cruz Mountains, and interior Monterey County, as well as for San Francisco from 10 a.m. to 8 p.m. Tuesday, according to the service. A heat advisory is in place for the North Bay's coastal portions, the Bay Area, the Central Coast and San Benito County.

San Francisco has yet to see a day above 90 degrees in 2024, records show.

The forecast high temperature for Tuesday for the city was 92 degrees as of Tuesday morning, with a predicted high of 88 degrees expected to follow Wednesday, according to the weather service, although the service noted the downtown area could reach as high as 96 degrees.

“Light offshore winds will erode the marine layer each morning, spiking coastal temperatures relatively early in the day,” the weather service said Monday in a short-term area forecast discussion addressing predicted events through Wednesday. “During the afternoons, we are expecting onshore flow to increase, moderating coastal temperatures a bit.”

Coastal temperature fluctuations in the coming days could be as drastic as changes of more than 10 degrees over the course of 30 minutes, according to the service.