MOUNTAIN HOME, Idaho (KBOI) - The Pony Complex of fires has been unpredictable, and fire crews are still working to build fire lines around the 90,000 acres burning near Mountain Home in the Boise National Forest. It's grown so much, that it's been divided into two parts, the Pony Complex and the Elk Complex.
Officials said the fires, which were sparked by a thunderstorm late Thursday night, nearly doubled in size from Friday to Saturday.
The fire has a high-growth potential as it spreads through the dry grass, brush and timber in the area.
The Elmore County Sheriff's office has ordered the evacuation of the small town of Prairie due to a large fire working its way closer to town.
Evacuations are also in place on Mayfield, Indian Creek, Regina and Baseline roads in Mayfield.
Forestry officials have brought in hotshots and instant management teams that are taking over a majority of the fire.
Highway 20 has been reopened after being temporarily closed to traffic. Officials ask drivers to remain cautious as firefighters move equipment around the area.
CLOSURES: The South Fork of the Boise River Road and access to Prairie via Black's Creek Road, Cow Creek Road and the Dixie Cutoff remains closed due to fire activity.
The Bureau of Land Management says it can't make any estimates for control or containment times yet. Crews say they expect that the Elk Complex Fire will burn longer than the Pony Complex Fire because it's in a more wooded area.