The Lake Chellan fire is burning in an abandoned, uninhabited area and no one knows who is to blame.
The flames started Saturday evening in a parking lot near the Chelan Falls State Recreation Area and have been burning since then.
The fire, which is now 15 percent contained, has charred more than 4,000 acres.
It’s not clear how the fire started, but some have speculated it was caused by a malfunctioning sprinkler system.
Officials said they expect the fire to expand.
Firefighters have put out fires in some areas of the community.