Hydro One says it was pole fire that left some of its customers in the west end of the district in the dark Thursday night.
It happened just before 7 p.m.
Nearly 16-hundred people living between Rainy River First Nation and the town of Rainy River and up towards Morson and Big Grassy First Nation were effected.
Hydro crews had their electricity restored by 10:30 p.m.