Firefighter crews responded to a fire approximately 12 miles northwest of Clarkston on Wednesday.

The blaze started at 12:08 p.m. Wednesday, according to a press release from the State Fire Marshal’s Office. The fire has been named the Nisqually John Fire, in reference to a location on the Snake River which is near the blaze.

State fire crews have been mobilized to combat the flames and the fire is threatening structures, farms and other dwellings, according to the press release. The fire was estimated at 40 acres Wednesday air resources have been activated.

The fire is currently burning brush and grass, according to the press release. Crews have begun investigating the cause of the blaze.