ore than 200 fire engines and firefighting crews from around the country were being rushed to California on Wednesday to help battle infernos which have left at least 23 people dead and thousands homeless.
"This is a serious, critical, catastrophic event," California fire chief Ken Pimlott told reporters. "We're not going to be out of the woods for a great number of days to come."
Pimlott said that after a respite on Tuesday winds kicked up again on Wednesday and the winds and dry conditions were hampering efforts to contain the blazes.
"We are still impacted by five years of drought," the director of the California Department of Forestry and Fire Protection (Cal Fire) said.
"These fires were driven by the critically dry fuel bed," he added. "We are literally looking at explosive vegetation."
Pimlott said the death toll from the fires, among the deadliest ever in California, could be expected to go up further.
Thirteen of the deaths have occurred in Sonoma County, a wine-producing region which has been particularly hard hit, while six people have died in Mendocino County. There have been two deaths in Napa County and two in Yuba County.
Entire neighborhoods in Santa Rosa, a city of 175,000 which is the county seat of Sonoma County, have been reduced to ashes.
Thousands of people have been left homeless and 25,000 people have evacuated their homes in Sonoma County alone, according to officials.
More than 3,500 homes and businesses have been destroyed including several wineries in Sonoma and Napa counties, the heart of the state's wine production.
Six hundred people have been reported missing in Sonoma County, but more than half of them have been located, Sheriff Robert Giordano told reporters.
"There's still 285 on our missing list that we're looking for," he said.
Pimlott said firefighters were battling a total of 22 wildfires that have burned over 170,000 acres (68,800 hectares) and that reinforcements had been requested.
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