Update 7:30 a.m. Thursday: Cal Fire says the Marsh Fire southeast of Clayton has burned 247 acres and is now 60 percent contained.
Although the firefighting agency says an aggressive response after the blaze broke out Wednesday afternoon halted its forward progress, evacuation orders remain in place for residents in the sparsely populated area southeast of the junction of Morgan Territory and Marsh Creek Roads.
Cal Fire says one residence and three outbuildings burned after the fire broke out shortly before 3 p.m. Wednesday. Another 100 structures are threatened.
About 180 firefighters are working to finish containment lines.
Original post (last pdated 6:10 p.m. Wednesday)