State and local firefighters responded Thursday afternoon to a small wildland fire east of Timber Cove and the Sonoma Coast beneath a sky already darkened by smoke and ash from a distant wildfire in Butte County.

The Sonoma County fire, first reported at 2:30 p.m. on Bohan Dillon Road, burned in grass and trees about 4 miles inland from the coast, Cal Fire spokesman Will Powers said.

It was confined to somewhere between 3 and 5 acres after about two hours without threatening any structures or requiring evacuations, Powers said.

Among those responding was an emergency task force assembled earlier in the day to ensure crews would be ready to go during a period of critical fire weather conditions, Assistant Santa Rosa Fire Marshal Paul Lowenthal said.

Crews were expected to remain on the scene of the coast-area fire overnight in case it flared up, Powers said.