California wildfires threaten towns, wineries in dangerous weekend

California fire crews deploying water-dropping helicopters made a defensive stand on Friday against flames raging in the foothills of the Napa Valley wine region as forecasts called for a return of high winds and hot weather over the weekend.More than 2,500 firefighters were battling the Glass Fire, which broke out on Sunday near the resort community of Calistoga, some 75 miles (120 km) north of San Francisco.The blaze has already destroyed 248 homes and other structures, including the stately C