'Dangerously Hot' In South Bay? Here's What To Expect

SANTA CLARA COUNTY, CA — Nearly all of the South Bay will face heat-related weather advisories this weekend.

An excessive heat warning will be in place for the Santa Cruz Mountains and eastern and western borders of the county, while a heat advisory will cover the Santa Clara Valley between Gilroy and San Jose, the National Weather Service announced Thursday. A small sliver of Santa Clara County fronting the San Francisco Bay has been spared.

The warning and advisory will be in effect from noon Friday through 10 p.m. Sunday and cover large swaths of the region, including areas in Alameda, Contra Costa, Marin, Napa, Santa Clara, Solano and Sonoma counties, according to the weather service.

The Santa Cruz Mountains have been added to the Excessive Heat Warning as temperatures will be in the upper 90s/low 100s. Temps to stay warm overnight in the 70s and 80s.

Also, a Heat Advisory was issued for the Santa Clara Valley. Temps expected in 90s/low 100s#CAwx #CAheat pic.twitter.com/Ns0zSbJqBe
— NWS Bay Area (@NWSBayArea) July 8, 2021

Parts of the Bay Area could see temperatures well above average and into the mid 90s to low 100s, according to the weather service. The hottest areas could see temperatures up to 110-degree weather. Areas immediately fronting the coast or bay should see lower temperatures.

Temperatures were expected to begin warming Thursday, the weather service said.

"Take it easy if you're spending time outdoors in peak heat and drink plenty of fluids," the weather service said.

Bay Area residents can likely expect some reprieve from the heat Sunday. Cooling is expected to continue into early next week, the weather service said.

Officials warned residents to be wary of heat exhaustion or heat stroke after spending prolonged time outdoors. People are especially vulnerable if they must spend a lot of time outside, don't have air conditioning, are older, are a young child or have chronic ailments, the weather service said.

Drink lots of water, stay out of the sun, and stay in air conditioning, the weather service said. Keep an eye on family members and neighbors.

Call 911 and immediately move into the shade if you are experiencing a heat-related illness.

Read the forecast here. See more tips for staying safe amid excessive heat from the U.S. Centers for Disease Control and Prevention.