But Cal Fire said Saturday morning that the Klamathon Fire had only destroyed 15 structures.
On the California-Oregon border, crews battled a fire that ignited Thursday and moved swiftly through a region that is home to many retirees, said Ray Haupt, chairman of the Siskiyou County Board of Supervisors.
In the mean time, the Santa Barbara County Sheriff's Office is assisting residents who live in the mandatory evacuation area with collecting necessities from their homes, like clothing and medication.
The fire's spread was stopped at about 100 acres (40.5 hectares) in a neighborhood where some houses were in ruins while homes next door were intact. The cause is still under investigation.
California Gov. Jerry Brown declared a state of emergency, citing "extreme peril" to people and property.
A firefighter puts water on flames at a home on Fairfield Avenue in Goleta.
Farther south, the West fire, just north of San Diego, was at 400 acres and only 5 percent contained as of 10 p.m. local time Friday.
Bill Murphy, public information officer with Cal Fire, said much of the fire is burning in steep terrain, making access hard for firefighters. Containment still stands at 80 percent and likely won't change much until midweek.
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While no fatalities have been reported, the fire spread in 100-plus degree weather nearly as fast as some residents could flee their homes, the newspaper reported. He was injured on July 5 in the Klamathon fire burning on the California-Oregon border. At least 132 homes have been destroyed.
"Temperatures at 8 a.m. were ridiculously over 100 degrees" in foothills near Forest Falls and many inland valleys, the National Weather Service said. It destroyed 22 structures. It marked the first fatality of the fire season in California.
The blaze consumed an estimated 20 structures, including homes and other types of buildings.
The fire spans about 193 square kilometres near a popular fishing reservoir about 130 kilometres southeast of Salt Lake City, according to the Utah Division Forestry Fire State Lands.
In Colorado, firefighters took advantage of occasional rainstorms to extend their containment lines at several large wildfires.
The fire spread to more than 20,000 acres, forcing the evacuation of small communities, including Hornbrook, where an unidentified body was found Friday morning in a burned out home.
Authorities said one person was killed in the fire.
Washington state fire crews left this weekend to help fight flames in Colorado. A stretch of busy U.S. Highway 285 between Fairplay and Antero Junction reopened Saturday.