(This story was updated with new information.)
Three separate fires burning south of Lake Perris merged into one wildfire Tuesday afternoon, Oct. 6, growing to 173 acres across flat terrain and a hillside. A road was closed as firefighters attacked the blaze.
The Pico Fire was reported at 11:56 a.m. near Ramona Expressway and Pico Avenue in Nuevo, a rural community east of Lake Perris and the city of Perris in Riverside County, according to Cal Fire’s Riverside County Unit…