The Santa Clarita fire, which started on Sunday on the 14 Freeway after a vehicle rolled over onto dry brush, had burned 870 acres as of Monday, according to Christopher Craft, an official with the Santa Clarita fire department. He said that one nonresidential structure had burned. The freeway has reopened and the fire is 57 percent under control, he said on Monday afternoon. One deputy was treated for smoke inhalation on Sunday night. The driver of the car, an 80-year-old woman, sustained moderate injuries and transported to a hospital. Mr. Craft said the fire should be completely contained within a day.