Firefighters from the Bureau of Indian Affairs were continuing to battle at least four wildfires on the Rosebud Indian Reservation as tribal leaders began evacuating residents.
Rosebud Sioux President Rodney Bordeaux says lightning storms sparked about 18 fires Thursday, and officials described five of the fires as out of control by Friday evening.
Bureau officials say no one has been hurt. As of Friday night, the fires were zero percent contained.
Dry conditions brought on by drought conditions exacerbated the blaze. Bordeaux says getting water to the fire trucks was proving difficult.
South Dakota Secretary of Travel Relations J.R. LaPlante says it's "going to be a long fight" because there's a lot of timber and the area is hilly.