SIMI VALLEY, Calif. (AP) — A wind-driven wildfire burning northwest of Los Angeles has grown to 1,300 acres. The Ventura County Fire Department says the blaze is threatening 6,500 homes. The fire erupted before dawn Wednesday between the cities of Simi Valley and Moorpark and has been spread by strong Santa Ana winds. Flames have approached the hilltop Ronald Reagan Presidential Library, but a spokeswoman says no damage has occurred.