Firefighters worked through the night to protect several homes threatened by a wildfire southwest of Pocatello.

The Powerline Fire has already destroyed six outbuildings. Fortunately, crews were able to keep the 40-foot tall flames away from homes, and no evacuations were in place on Sunday.

According to the BLM, the fire burned aggressively through the night, moving from Fort Hall Indian Reservation lands toward the northeast, and is currently burning about four miles southwest of Pocatello.

The latest estimates show the fire to be about 46,000 acres in size. Officials say the fire was human-caused, and an investigation is underway.

It ignited on the Fort Hall Indian Reservation on Friday, and is burning in sage, grass, and juniper.

The fire has jumped the Arbon Valley Highway several times, and was burning northeast toward the Caribou-Grand Targhee National Forest in strong winds Saturday afternoon.

Fifteen engines, six water tenders, four dozers, two hand crews and air support - including three single air tankers, two heavy air tankers, and one "very large air tanker" - were assigned to the fire Saturday. More resources have been called in to the area.