Firefighters continued to make progress Sunday against the deadly wildfires ravaging neighborhoods up and down California, boosting containment as more residents were allowed to return home.

A red flag warning remained in effect in parts of Northern California, where the Camp fire in Butte County has consumed 149,500 acres, killed at least 76 people and destroyed 12,786 structures, according to the California Department of Forestry and Fire Protection.

The death toll has risen every day as search crews continued to sift through the rubble, while the list of people unaccounted for reached 1,276 Saturday night. Officials said the number is far from precise and could include duplicates and the names of people who have not checked in with relatives or authorities.

By Sunday morning, the fire was 60 percent contained. But forecasters expected that gusty winds will lead to critical fire weather conditions in parts of the western slopes of the northern Sierra. Officials said smoke from the fire would continue to cause poor air quality across the region through Tuesday.

In Southern California, the Woolsey fire has burned 96,949 acres and destroyed about 1,130 structures. By Sunday morning, it was 88 percent contained and Cal Fire said it expects full containment by Thursday.

A chance of rain later this week has crews bracing for possible mudslides in burn scars of both fires.

Butte County could get 4 to 5 inches of rain from Tuesday night through the weekend, with the heaviest rain Thursday night, said Eric Kurth, a meteorologist with the National Weather Service.

“That’s going to be spread out over a period of days, not coming down all at once,” he said.

That may be a good sign. Typically, debris flows are expected when rain falls at 1/2 inch per hour or more, said David Gomberg of the weather service.

In Southern California, there’s about a 50 percent chance of rain over the areas charred by the Woolsey fire as soon as Wednesday, Gomberg said. Forecasters say the area could get 1/4 to 3/4 of an inch of rain.