A massive wildfire in California is spreading rapidly at a rate of eight square miles an hour, threatening thousands of homes and forcing people to flee. br br More than 130 homes have already been destroyed by the Park Fire, the state's largest wildfire of the year so far, which covered 480sq miles (1,243sq km) on Friday evening.br br It started in Butte County on Wednesday and has been moving quickly north and eastwards since then. A 42-year-old man has been arrested in connection with the fire over reports he pushed a burning car into a gully in Chico before fleeing the scene.