The Bay Area Air Quality Management District has issued an air quality advisory through Saturday as smoke from wildfires in the Sierra moves into the region.
The smoke was expected to drift into the Bay Area late Thursday night and into Friday morning but is expected to remain aloft and not exceed federal health standards, according to the air district. The advisory was initially supposed to last through Friday, but air quality officials have since extended it to Saturday.
Also contributing to Bay Area smoke is a fire on San Bruno Mountain in Brisbane, which was reported just before 11 a.m. Thursday. Multiple agencies are battling the blaze, and aircraft are being used. As of about 5:15 p.m., the fire burned 5 acres was 60% contained. No injuries were reported.
The district is encouraging people to stay inside with windows and doors closed if they smell smoke.