With dry, desiccating offshore winds developing in the San Francisco Bay Area during a severe early-autumn heat wave, officials warned Friday that the risk of wildfire sparks and spread is high. The National Weather Service issued a red flag warning just before 11 a.

An excessive heat warning has been extended for much of the Bay Area through late Friday night, as a late season heat wave continues to bring hot temperatures to the region, some of which have been record-breaking.