Thousands of residents were under evacuation and shelter-in-place orders early Tuesday after heavy rains unleashed mudslides in a mountain area east of Los Angeles that burned two years ago, sending boulders and other debris across roads.

Firefighters went street by street in the community of Forest Falls Monday night to make sure no residents were trapped. Eric Sherwin, spokesperson for the San Bernardino County Fire Department, said crews hadn’t found anyone who needed to be rescued and no one was reported missing. Crews would canvas the neighborhoods again and begin cleanup efforts after sunrise, he said.

A wood products company said that it is investigating whether a fire that killed two people as it swept through a Northern California town was caused by the possible failure of a water-spraying machine used to cool ash at its veneer mill.

Roseburg Forest Products Co. also announced that although the investigation was not complete, it was planning to provide up to $50 million for a community restoration fund.

The Mill Fire erupted Sept. 2 at the company’s facility in the small town of Weed on Interstate 5, about 280 miles northeast of San Francisco.

The main highway from Los Angeles to Phoenix was damaged by a flash flood that washed out part of the road through the Southern California desert in the latest bout of punishing monsoonal thunderstorms that have hit the region this summer.

The newest round of flooding started Wednesday evening, damaging a roadway that was part of a detour past a repair project along eastbound Interstate 10 near the small community of Desert Center, about 165 miles east of Los Angeles.

Traffic in both directions was halted initially, but westbound lanes for motorists heading from Arizona to California reopened later.

Wildfires in California and Montana exploded in size overnight amid windy, hot conditions and were quickly encroaching on neighborhoods, forcing evacuation orders for over 100 homes Saturday, while an Idaho blaze was spreading.

In California’s Klamath National Forest, the fast-moving McKinney fire, which started Friday, went from charring just over 1 square mile to scorching as much as 62 square miles by Saturday in a largely rural area near the Oregon state line, according to fire officials. The fire burned down at least a dozen residences and wildlife was seen fleeing the area to avoid the flames.

Preston Brown knows the risk of wildfire that comes with living in the rural, chaparral-lined hills of San Diego County. He’s lived there for 21 years and evacuated twice.

That’s why he fiercely opposed a plan to build more than 1,100 homes in a fire-prone area he said would be difficult to evacuate safely. Brown sits on the local planning commission, and he said the additional people would clog the road out.

“It’s a very rough area,” Brown said. “We have fires all the time now.”