Officials urged residents in rural mountain communities to evacuate as they battled one of California's largest and longest-lasting wildfires. Thick smoke turned the sky gray and purplish Tuesday as flames rolled through pines and juniper trees on slopes of Los Padres National Forest, where more than 3,800 firefighters have battled the blaze since it started on Labor Day. "The problem is we've had extremely dry fuels," fire spokesman Dan Bastion said Wednesday. "Brush and trees will be ignited by the heat of the fire, so there's a domino effect going on." Fire trucks, bulldozers and water tankers guarded homes within...