A car fire in Vallejo Thursday afternoon spread to nearby hillside, threatened homes and shut down parts of Interstate 80 to allow fire crews to battle the blaze, authorities said. By 1:45 p.m., the fire had moved away from the highway and was burning in the direction residential areas from Sonoma Boulevard to Glen Cove area of Vallejo, authorities said. While the Vallejo Fire Department reported on Twitter that multiple homes were burning, aerial footage from news helicopters showed the fire within feet of homes and appeared to be burning backyard fences. Two lanes on eastbound Interstate 80 were shut down to enable firefighters easy access to the flames, said Officer David Harvey with the California Highway Patrol.