The largest of them, the Carr Fire north of Sacramento near the city of Redding, has burned for more than a week and engulfed almost 190 square miles.
The fire has burned an area four times the size of San Francisco.
Just a month into the budget year, California has already spent more than one-quarter of its annual fire budget, at least $125 million, state Department of Forestry and Fire Protection spokesman Mike Mohler has said.
However, authorities who had feared there might be more casualties reported Wednesday that all those who had been reported missing had been located.
"The western edge of fire continued to challenge crews yesterday evening", Cal Fire said Wednesday.
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Firefighters conduct a controlled burn to defend houses against flames from the Ranch fire, as it continues to spreads towards the town of Upper Lake, California on August 2, 2018.
"For instance, previous year we had the floods so we brought lots of resources from the outside", San Jose Fire Captain Mitch Matlow said.
So far, a total of six people have been killed as a result of the blaze, including two firefighters assisting efforts to control it.
California state Governor Edmund G. Brown Jr. issued an emergency proclamation on July 28 for a number of areas now under the influence of aggressive wildfires.
The inferno swiftly engulfed everything in its path as residents fled for their lives, many with only their pets and a few belongings.
The major fires in Northern California presented mixed news on Wednesday. High temperatures, low humidity and afternoon winds along with low fuel moistures are aiding large fire growth, officials said. Jerry Brown said at a news conference Wednesday.