The Bay Area Air District on Sunday night issued an air quality advisory for the North Bay through Monday due to wildfire smoke from the Chileno Fire burning in Marin County.

A health advisory for smoke generated by the 341-acre blaze has been issued for Sonoma and Marin counties but could expand to other counties.

“Smoke is currently impacting portions of Sonoma and Marin counties and may spread into Napa and Solano counties,” the air district said Sunday night.

Forward progress on the fire was halted Sunday evening.

Smoke impacts are not guaranteed, the air district said, and the 24-hour average smoke concentrations are not expected to exceed the national health standard. Conditions can change rapidly, and the amount and location of smoke at ground level remain difficult to predict. As of Sunday night, no Spare the Air advisory had been issued.

Residents may experience “unhealthy for sensitive groups,” “unhealthy” or “very unhealthy” air quality caused by the fire, and certain people may experience adverse health effects across the region, health officials said.

Residents should keep windows and doors closed and bring in pets.

Check the U.S. Environmental Protection Agency’s Fire and Smoke Map to see if smoke is affecting an area.

Katy St. Clair got her start in journalism by working in the classifieds department at the East Bay Express during the height of alt weeklies, then sweet talked her way into becoming staff writer, submissions editor, and music editor. She has been a columnist in the East Bay Express, SF Weekly, and the San Francisco Examiner. Starting in 2015, she begrudgingly scaled the inverted pyramid at dailies such as the Vallejo Times-Herald, The Vacaville Reporter, and the Daily Republic. She has her own independent news site and blog that covers the delightfully dysfunctional town of Vallejo, California, where she also collaborates with the investigative team at Open Vallejo. A passionate advocate for people with developmental disabilities, she serves on both the Board of the Arc of Solano and the Arc of California. She lives in Vallejo.