A damp weekend helped firefighters stop the growth of a huge Southern California wildfire.
Authorities told CBS2’s Tom Wait on Thursday that they were narrowing on arson as the cause.
Fire crews are gaining ground on the Sterling Fire in the Del Rosa area.
No evacuations have been ordered.
The blaze about 90 miles east of Los Angeles has charred 36 square miles of timber and brush since June 17. As of Thursday, it was only 21 percent contained.
Firefighters continued to battle a wildfire Tuesday that they say remained active in the San Bernardino mountains south of Big Bear Lake.
Crews responded Monday morning to a 10-acre brush fire moving uphill toward West Covina homes.
A high pressure system that pushed temperatures into the triple digits in SoCal over the weekend is drifting east, allowing a gradual cooling trend into the middle of the week.
The fire burning east of Camp de Benneville Pines and south of Jenks Lake Road prompted help from more than 500 firefighters deployed to the area, along with several aircraft.
Winds fanned the flames up a hill and toward a freeway guardrail, prompting the California Highway Patrol to order the lane closures on both sides of the freeway. Traffic was backed up for miles.
A brush fire that broke out in Ontario late Monday afternoon was under control, though hot spots continued to burn into the evening hours.
The fire has gone to two alarms.
Firefighters responded to a brush fire that broke out in Kagel Canyon shortly after 11 a.m. on Saturday.
Crews Monday are working to contain a brush that has erupted in Santa Clarita.
Firefighters Wednesday battled a brush fire near Dodger Stadium.