Skip to main content Currently Reading Red flag warning: National Weather Service says high fire danger is ahead for Bay Area due to dry lightning forecast FacebookTwitterEmail Cal Fire fighters and U.S. Forest service firefighters battle a wildfire on the south coast of Big Sur, near Lucia, Calif. on the evening of Saturday, August 22, 2020 and into the morning of Sunday, August 23, 2020.Kodiak Greenwood / Special to The Chronicle The risk of dry lightning and gusty winds pitched a large swath of the Bay Area into a red flag warning scheduled to start Sunday morning and last until Monday evening. The forecast and warning, announced by the National Weather Service, centered on the higher elevations, including the North Bay and Santa Cruz mountains as well as the East Bay hills and Diablo Range.