https://www.mercurynews.com/2021/07/17/bay-area-issued-red-flag-warning-due-to-dry-lightning-risks-at-high-elevations/

The National Weather Service has issued a red-flag warning for high-elevation areas in the Bay Area due to the risk of dry lightning sparking fires by the end of the weekend.

Places that are at least 2,000 feet above sea level have a pronounced risk, according to the NWS, which identified parts of the South Bay, East Bay, Peninsula and North Bay — as well as San Benito and Monterey counties — as the focus of the red-flag attention.