Contra Costa County firefighters work to extinguish a four-acre vegetation blaze on Pullman Avenue in Bay Point on Monday. The fire started around 2:30 p.m. at Pullman and Fairview avenues. The blaze scorched a total of 10 acres, and as of 3:30 p.m., fire crews were remaining on the scene doing mop-up work. No structures were threatened, and no one was reported injured. A spokesperson said it was caused by someone “mowing” grass. Jose Carlos Fajardo — Staff photographer