Weather

Sizzling hot week expected to be on tap for the Bay Area

The first sizzling onslaught of summer heat will grill the Bay Area this week, complete with heat advisories and temperatures that may reach 100 degrees in some of the hottest places.

“It’s gonna start to feel really warm on Tuesday during the day,” National Weather Service meteorologist Dial Hoang said Monday morning. “It’s gonna be significant and very noticeable.”

Residents of the region were set to receive one more mild, cool day before the onset of the heat, which Hoang said is being generated by a sub-tropical high pressure system approaching the West Coast. That system is supposed to set in place at least through Thursday, affecting the marine layer on the coast and causing temperatures to jump as much as 15 degrees in some areas, according to the weather service.

Temperatures on Tuesday are expected to break through the 90-degree barrier in San Jose and Morgan Hill, as well as the 95-degree mark in Concord. By Wednesday, areas such as Livermore, Brentwood and Morgan Hill — typically three of the hottest spots in the region — may crack 100 degrees.

A heat advisory for the East Bay hills and the interior valleys will be in effect from Tuesday through Thursday, as it will be in the Sonoma County coastal range and the North Bay interior mountains and valleys. That same advisory begins Wednesday in the Santa Clara Valley, Eastern Santa Clara hills and mountains and the San Benito and interior Monterey County.

“We’re really emphasizing our heat safety tips,” Hoang said. “Take breaks in the shade, limit your outdoor activities in the afternoon and evening hours. And never, ever leave any person or pet in the car.”

The heat wave is expected to relinquish Friday, but Hoang said temperatures are expected to be warmer than they were during a cool off that followed a brief heat up on Friday and Saturday.