The blaze destroyed an unknown number of structures and forced residents in the small communities of Hornbrook, Hilt and Colestein Valley to flee as flames crossed Interstate 5 near the California and OR border, local media reported. Nine structures have been destroyed and some 100 homes were said to be in danger.
More information on mandatory evacuations can be found, here.
CAL FIRE and the Siskiyou County Sheriff's Department confirmed a civilian fatality from the Klamathon fire Friday.
East of Los Angeles in the San Bernardino National Forest, authorities ordered the evacuation of the community of Forest Falls, which has about 700 homes, as a quick-moving fire swelled to 1,000 acres.
Governor of California Jerry Brown declared a state of emergency for Siskiyou County, citing "extreme peril" to people and property.
He said numerous people he has talked to were either traveling or away for work when the blaze started Thursday and have not been able to find out the status of their homes.
"It's really given us a good opportunity to get in there and get some work done", Zaniboni said, cautioning that critical fire weather warnings would remain in effect until the evening.
Fire Capt. Dave Zaniboni said there was no wind at all Saturday morning - a far different situation than Friday night when the fire erupted and was spread wildly by 50 miles per hour gusts. Downtown Los Angeles reached a daily record high of 108 degrees.
The Klamathon Fire is one of about a dozen blazes Cal Fire is battling across the state, the largest located in Northern California.
"It's going to be a long fire season", Lee Beyer with the U.S. Forest Service says, noting the dry winter and near-drought conditions in much of the western U.S.
Video from news helicopters showed fire crews running along Interstate 8 in Alpine and trying to quell the flames that were spreading along the side of the freeway as a handful of homes were completely engulfed in flames. But the threat of a deluge raised the possibility of flooding in the area of a stubborn blaze in the southwestern corner of the state.
The wildfire, which started June 23, left one person injured and 22 structures destroyed.