There's no full official tally of the destruction yet because firefighters are focused on new evacuation orders and on residents' safety, he said.
People were ordered Sunday to evacuate a stretch along Highway 281, including Clear Lake Riviera, a town with about 3,000 residents, Cal Fire said.
George Escalona said that in some areas of town "there is nothing but burned houses, burned cars," adding that all he had left were the clothes he was wearing.
Mark Donpineo, 54, said he and two friends were trapped by the fire for four hours Saturday evening at a golf course in Hidden Valley Lake, taking cover in a culvert until the flames had passed.
"We got some towels, wetted them down and basically saw the fire coming. You could hear explosions of propane tanks, the ridge was totally on fire, trees were blowing up," he said.
The 78-square-mile fire erupted Saturday afternoon and rapidly chewed through brush and trees parched from several years of drought. Entire towns as well as residents along a 35-mile stretch of State Route 29 were evacuated. Gov. Jerry Brown on Sunday declared a state of emergency to free up resources.
Brown had already declared a state of emergency for a separate 102-square-mile wildfire about 70 miles southeast of Sacramento that has destroyed at least 81 homes and turned the grassy, tree-studded Sierra Nevada foothills an eerie white.
The fire, which broke out on Wednesday, was threatening about 6,400 more buildings.
Mark Ghilarducci, director of the Governor's Office of Emergency Services, said this summer's fires are the most volatile he has seen in 30 years of emergency response work. The main cause behind the fast-spreading fires is dry conditions from the four-year drought, he said.
"The bushes, the trees have absolutely no moisture in them, and the humidities are so low that we are seeing these 'fire starts' just erupt into conflagrations," Ghilarducci said, according to the Bee.
In late July, a wildfire east of Clear Lake in Lake County destroyed 43 homes as it spread across 109 square miles. As firefighters drew close to surrounding that blaze, another fire erupted several miles from the community of Lower Lake on Aug. 9 and more than doubled in size overnight.
Residents in the area had to evacuate from their homes two times in as many weeks.
East of Fresno, the largest wildfire in the state continued to march westward and away from the Giant Sequoia trees, fire spokesman Dave Schmitt said. The fire, which was sparked by lightning on July 31, has charred 203 square miles and was 31 percent contained Sunday, the U.S. Forest Service said.
Some fire came through the area but it hasn't done much harm, fire spokesman Frank Mosbacher told the Fresno Bee.
The grove is named for the towering General Grant tree that stands 268 feet tall. There are dozens of Sequoia groves in the Sierra Nevada, and some trees are 3,000 years old.
Al Jazeera with wire services
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