The National Weather Service Friday morning issued an adjusted weekend heat advisory to include North Bay valleys. While cities like Santa Rosa are expected to reach high 90s on Saturday, the valley areas will narrowly escape the extreme heat in store for the region’s mountain ranges and much of the East Bay interior area.
After making some finer adjustments to the forecast we have included the North Bay Valleys in the Heat Advisory.
— NWS Bay Area 🌉 (@NWSBayArea) July 9, 2021
Excessive Heat Warnings and Heat Advisories go in effect this afternoon.
Be sure to find ways to stay cool, stay hydrated, and stay safe this weekend.#CAwx pic.twitter.com/HnJ64VMB7L
Some inland East Bay and Tri-Valley cities will see triple-digit temperatures through late Sunday night. According to the NWS, Concord will get to 106 Friday and climb to 107 Saturday — that forecast in mirrored in Livermore. The North Bay city of Cloverdale is expected to reach 108 on Saturday.
This latest extreme heatwave will impact most of California, Arizona, Nevada and Utah. The area surrounding Furnace, California near the Nevada border is expected to hit a Saturday high of nearly 130.

The Bay Area coast will remain fairly cool and mild, with a San Francisco high of 72 on both Saturday and Sunday.
People in extreme heat zones are urged to stay hydrated, remain in air conditioned indoor spaces and limit outdoor activity as much as possible. The same suggestions apply to pets.
Cooling centers are being made available in both Alameda and Contra Costa counties. Details can be found by visiting the following links: Alameda County, Contra Costa County.