Hundreds of volunteers to search for California wildfire remains

RIVERS OF MUD

The rains, which in some areas were likely to be accompanied by winds of up to 45 miles per hour (72 kph), raised risks of ravines turning into rivers of mud. The fire has burned across 153,336 acres (62,000 hectares) of the Sierra foothills and is 85 percent contained.

"There's no vegetation to hold the earth and there's a risk it could just start moving, with mud carrying everything in its path," National Weather Service forecaster Johnnie Powell said in Sacramento.

The death toll has been gradually rising, with two more names added to the list on Wednesday to bring the total to 83 people, with 58 of them tentatively identified, Honea said.

The number of people unaccounted for, which has fluctuated widely over the past week, declined by 307 to 563 on Wednesday.

Asked about the effects of rain on the search for remains, Honea said it would make going through debris more difficult but he was less concerned about remains washing away than the headaches posed by mud.

Still, he said some remains might never be found.

"What we're looking for in many respects are very small bone fragments so, as we go forward, it's certainly possible that not all of them will be located," Honea said.

The Camp Fire incinerated 13,503 homes in and around Paradise. The cause of the fire remains under investigation.

The state is undertaking the largest single wildfire cleanup operation in its history to remove toxic and radioactive ash and debris at burned home sites, said Eric Lamoureux from the Governor's Office of Emergency Services.

Butte County says evidence from recent fires in California showed that some destroyed homes and property contained "high and concerning levels of heavy metals, lead, mercury, dioxin, arsenic and other carcinogens. Some property may have the presence of radioactive materials."