UPDATE (3:31 p.m.): Valencia Boulevard and Magic Mountain Parkway is open to drivers. Toppers Pizza remains closed Sunday afternoon. Previously published (1:00 p.m.) :A series of underground vault explosions outside Toppers Pizza in Valencia prompted an evacuation and closed the busy intersection of Valencia Boulevard and Magic Mountain Parkway Sunday. The first reported explosion occurred around 12:06 p.m. near Toppers ...

Officials have learned that the explosion that sparked the Rye Fire in Valencia late Tuesday afternoon was caused by “commercial pyrotechnics” from a nearby private company, ultimately sending four people to the hospital with “extensive injuries.” Just before 4:45 p.m. Tuesday, officials with both the Santa Clarita Valley Sheriff’s Station and the Los Angeles County Fire Department received reports of ...