California's deadly Camp Fire now fully contained

The deadliest wildfire in California history, which destroyed the mountain town of Paradise and killed at least 85 people, is now 100 per cent contained, according to state fire officials.

The number of people still missing from the Camp Fire, which was burning north of San Francisco, dropped to 249 on Sunday, the Butte County Sheriff's Office said. The number was revised down from 475, as people who were believed missing were found in shelters, staying in hotels or with friends, officials said, adding that many did not know they were on the list.

The Camp Fire started on Nov. 8 and destroyed nearly 14,000 homes and burned more than 62,000 hectares an area five times the size of San Francisco.

• Risk of mudslides looms for northern California after wildfire

Searchers still looking for human remains will have a few more days of dry weather, but starting late Tuesday, another five to 13 centimetresof rain is expected to drop on the Sierra Nevada foothills through next Sunday, hampering the searchers work and renewing fears of flash floods and mudslides, forecasters said.

"The fear is that the rain will drop in intense bursts," said Brian Hurley, a meteorologist with the federal Weather Prediction Center in College Park, Md.

"All the vegetation has burned away, and that's a dangerous recipe for mudslides," Hurley said.

Last week, five to eight centimetresof rain fell and turned ash from the thousands of destroyed homes into slurry, complicating the work of finding bodies reduced to bone fragments.

Butte County Sheriff Kory Honea has warned that remains of some victims may never be found. The town of Paradise was a popular destination for retirees, with people aged 65 or older accounting for a quarter of its 27,000 residents. Most of the victims of the fire identified so far were of retirement age.

• 'This is where they must have found her': Woman who refused to flee California fire is one of the dead

Investigators have yet to determine the cause of the fire.

Thousands of people forced to flee Paradise spent U.S. Thanksgiving in warehouses in the nearby city of Chico, or with friends or relatives in nearby towns.