Those fires have forced the evacuation of 20,000 residents, and destroyed more than 100 structures.
Pacific Gas and Electric Company tells ABC News a crew member was doing restoration work in Shasta County when an unspecified accident happened. PG&E says it's now reviewing safety measures for all of its crews working in Northern California fire zones. Jerry Brown on Saturday called on President Donald Trump to help California fight and recover from another devastating wildfire season.
"The president has been pretty good on helping us in disasters, so I'm hopeful", said Brown, a Democrat. "Tragedies bring people together".
A pair of fast-growing wildfires in northern California expanded to more than two-thirds the size of sprawling Los Angeles, becoming the sixth-largest blaze in state history.
"The fire is continuing to progress into some really ugly country up here, so the only option is to go direct and try and cut it off before it gets to Lake Pillsbury, and we're having success building line (around Pine Mountain) and we think we're looking OK up there".
Cal Fire said on August 3 that the Ranch Fire, which is burning northeast of Ukiah, had consumed about 115,250 acres since it started on July 27, with firefighters managing to contain about 28 percent of the blaze.
California has not been suffering record temperatures, but the minimum overnight temperatures for the month of July at 64.9 degrees were a record since the weather service began collecting accurate data in 1950 and about 5 degrees warmer than the average over 68 years, according to Wildfire Today.
There are at least 18 major fires burning throughout California, authorities said.
Hundreds of colleagues, family and friends attended a memorial service Saturday in Fresno for National Forest Service Capt. Brian Hughes, the Fresno Bee reported.
In the Sierra Nevada, firefighters achieved 41 percent containment of the Ferguson Fire, a forest fire that has shut down Yosemite Valley and other adjacent portions of Yosemite National Park at what is normally the height of summer tourism.
Yosemite Valley residents must leave the valley by noon Friday, National Park Service officials said.
While winds were diminishing Sunday, dry conditions persisted, said Erica Bain, a spokeswoman for Cal Fire, the state's fire agency.
The wildfire has grown to 175 square miles (280 square kilometers) and is a few miles from connecting with a second blaze that has grown to 64 square miles (105 square kilometers). An evacuation center is open for Colusa County residents at Colusa County Veterans Hall at 108 E Main Street in Colusa.
"This is a particularly unsafe situation with extremely low humidity and high winds". Sunday was the 72nd consecutive day without rain in the area, she said.
Meanwhile, firefighters battling the deadly and destructive wildfires in the region faced worsening weather conditions.
"Fire season is really just beginning", said California fire director Ken Pimlott. Four of the state's largest six fires have occurred since 2012.