Shasta County Sheriff Tom Bosenko said on Sunday that the remains of an unidentified victim were found within the boundary of the Carr Fire near Redding.
Bosenko also said that the sheriff's department was investigating seven reports of missing people.
The firefighters killed in the blaze included Don Ray Smith, 81, of Pollock Pines, a bulldozer operator who was helping clear vegetation in the path of the wildfire. Friday afternoon the Redding Fire Department confirmed that Inspector Jeremy Stoke perished.
According to the AFP, "Two young children and their 70-year-old great-grandmother Melody Bledsoe died in the Carr Fire, their family confirmed to United States media".
"The boat docks down there - all the way out in the water - 30 to 40 boats caught fire when the fire laid down on top of them last night and burned those up", said fire Chief Mike Hebrard of the California Department of Forestry and Fire Protection. When Jason Campbell returned on Friday, he found their home of five years was gone, along with an RV and a boat.
Moore said property can be replaced, noting that the fire had also taken lives.
Six people have died in California, including a great- grandmother and her two great-grandchildren, as wildfires ravage the state.
Firefighters tried in vain to build containment around the blaze Thursday, but flames kept jumping their lines, he said. "I didn't know if the fire was just going to jump out behind a bush and grab me and suck me in".
Authorities on Sunday had not reopened neighborhoods in Redding that were devastated by the flames.
He said the fire consumed the house, the walls collapsed and the roof is covering the footprint of the home, making it hard to access. Lakeport, home to about 5,000 people, is around 190 kilometres north of San Francisco.
Crews are getting control of a small wildfire in California's wine country county of Napa, but two blazes farther north are raging mostly unchecked.
The 45-square-mile fire that began Monday tripled in size overnight Thursday amid scorching temperatures, low humidity and windy conditions.
According to the California Governor's Office of Emergency Services (Cal OES), 17 large-scale fires were burning, with 12,000 firefighters deployed across the state.
Six people people were killed and seven remain missing as a wildfire in Northern California that burned hundreds of structures grew to almost 90,000 acres Sunday.
The weather forecast for the south part of the Carr Fire near Igo for Saturday calls for a high of 110 degrees, 11 percent relative humidity, and variable winds at 5 to 10 miles per hour gusting up to 13.
"There's so much smoke up there, it's actually keeping the temperature down by about 10 degrees", Barufaldi said. The winds that aided crews in keeping the flames from more populated areas were propelling the inferno at a frightening rate in unpredictable directions.
Residents who gathered their belongings in haste described a chaotic and congested getaway as the embers blew up to a mile ahead of flames and the fire leaped across the wide Sacramento River and torched subdivisions in Redding, a city of 92,000 about 100 miles south of the OR border.
The latest tally showed at least 517 structures destroyed and another 135 damaged, with the fire having consumed 139 square miles (360 square kilometers).
The fire has destroyed 500 structures, and officials say 5,000 more are threatened.
At least five people are dead and more than 38,000 people displaced as firefighters work to contain the blaze. "We sent officers to some of these places (where they lived) and the houses were intact, so it's more than likely those people just evacuated".
Anna Noland, 49, was evacuated twice in three days before learning through video footage that the house she last saw under dark and windy skies had burned.
He said when the couple first got together, she had about $24,000 in the bank.