Megan Janes says her aunt and uncle, Paradise residents Paula and Randy Dodge, are no longer missing but also "no longer with us". Actor Gerard Butler said on Instagram that his house in Malibu was "half-gone".
The Camp fire is now by far the worst wildfire in California history.
The inferno is one of the most lethal single wildfires in the United States since 1900.
"The fact that we have thousands and thousands of people in shelters would clearly indicate that we were able to notify a significant number of people", the sheriff said.
The US President Donald Trump is due to visit fire-affected parts of the state at the weekend where he's likely to get a frosty reception.
One week after the fire started, firefighters reported progress in battling the 141,000-acre blaze that has displaced 52,000 people.
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Butte County Sheriff Kory Honea told those gathered at a news briefing that the number of missing persons reflected ongoing work by emergency response personnel sifting through reports, but said numerous unaccounted for may simply be displaced in shelters throughout the region.
"But there is sometimes an image of Malibu that people like me are more than other people, and there's a lot of people who need help from outside from you", Martin told the board.
The Northern California fire that began a week earlier obliterated the town of Paradise and caused such carnage that searchers continued to pull bodies out of incinerated homes and cremated cars. 56 people are now confirmed dead and many more remain unaccounted for. The toll had reached 63 dead and 9,800 homes destroyed.
The fire is now 40 percent contained, according to the California Department of Forestry and Fire Protection and the Butte County Fire Department.
At the other end of the state, meanwhile, more residents were being allowed back into the zone of a wildfire that torched an area the size of Denver west of Los Angeles. Paradise even conducted a mock evacuation during a morning commute, turning the main thoroughfare into a one-way street out of town.
The blaze destroyed almost 8,800 homes in the former gold mining settlement. At least three deaths were reported.