Grants Pass, Ore. ? Higher humidity and favorable wind on Sunday helped firefighters trying to corral the northern end of Oregon’s largest wildfire in more than a century.

Northeast winds helped firefighters set controlled fires during the night to remove fuel from the path of the 333,890-acre blaze.

“It’s kind of burning back onto itself on the slopes,” said Nigel Baker, a U.S. Forest Service spokesman. The fire was about 25 percent contained, said Carol Tocco of the Northwest Interagency Coordination Center.

In California, three U.S. Forest Service firefighters on their way to fight a 20-acre blaze were critically injured Sunday night when their fire truck plunged 60 feet down an embankment, authorities said.

The fire engine was traveling southbound on Interstate 15 in San Bernardino, Calif., when it rolled off the highway. The cause of the accident was under investigation.

The truck was on its way to a blaze in Liddle Creek, said Karen Terrill, a spokeswoman for the California Department of Forestry.

In Calimesa, Calif., about 30 miles west of Palm Springs, firefighters battled an out-of-control brush fire that tore through 250 acres, forcing 150 residents to evacuate and threatening 100 homes.

More than 250 firefighters fought the fast-moving fire with helicopters, airplanes and bulldozers. The fire threatened several cherry and apple farms as well as horse ranches.