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Santa Ana winds raise Southern California fire danger

A firefighter monitors the Colby Fire burning for a second day on a hillside above Highway 39 in Azusa, California. Three men have been arrested and charged with starting the fire that has now destroyed 1,700 acres of land and several homes around Glendora and Azusa in the San Gabriel Valley, prompting officials to order evacuations for houses near the fire.
A firefighter monitors the Colby Fire burning for a second day on a hillside above Highway 39 in Azusa, California. Three men have been arrested and charged with starting the fire that has now destroyed 1,700 acres of land and several homes around Glendora and Azusa in the San Gabriel Valley, prompting officials to order evacuations for houses near the fire.
Jonathan Alcorn/Getty Images

A red flag warning for fire danger is posted for much of Southern California as dry and gusty Santa Ana are once again expected to blow through the region.

The National Weather Service says the warning is in effect through 8 p.m. Friday for mountain and valley sections of Los Angeles, Ventura, Santa Barbara and San Luis Obispo counties.

Gusts between 40 and 50 mph are predicted for some areas, with the strongest winds coming during morning hours. Temperatures are expected in the high 60s and low 70s.

Southern California has experienced weeks of wind events and low humidity, which has made vegetation dangerously dry and raised wildfire danger.

Crews are very close to fully containing the Colby Fire, a week-old 3-square-mile conflagration that destroyed five houses in Glendora and Azusa.