State forestry officials Saturday began reseeding watershed areas blackened in a 35,000-acre arson fire that destroyed seven homes and threatened dozens of others.

In Yellowstone National Park, where fires have burned half the park's 2.2 million acres, things were looking so good that more than half the 3,500 remaining firefighters, a "good chunk" of them Army soldiers and Marines, were being demobilized, spokeswoman Marsha Karle said."Things have been so quiet lately," Karle said.

Two fires were still burning in Yellowstone but rain and snow have ended the threat of expansion, Karle said.

The fire north of Vacaville, about 50 miles northeast of San Francisco, was completely contained and was to be fully controled by sundown, fire information officer Dianne Sanders said.

"Everything looks good," she said. "We've already started on rehabilitation of the burned areas, repairing roads and culverts and putting up fences that were damaged."

She said the rehabilitation included reseeding of the area. Most of the 2,000 firefighters who worked on the fire last week were being sent home, she added.

Fanned by 50 mph winds, the fire spread quickly last Sunday and Monday through dry grass and brush in a hilly, sparsely populated area. Seven homes and 11 other structures were destroyed.

The investigation into the arson continued.

Elsewhere, quick action by firefighters in Washington state kept a fire sparked by a trash burn from becoming the West's next major inferno.

Near Chelan, Wash., a debris-burning fire got out of control Friday and sparked a wildfire that raced to 6,000 acres before being slowed by cooler temperatures. The fire was contained overnight.