Fire officials said Friday that crews are expected to have 100 percent containment on the 440 acre Karney Fire in Boise County by midnight Sunday.

The fire, which threatened about 100 homes in the Wilderness Ranch Subdivision earlier in the week, was listed at 40 percent containment Friday morning. Only one vacant residence caught fire.

Fire crews reported little growth on the blaze overnight and will concentrate Friday on moping up hot spots within 200 feet of the firelines and securing lines closest to homes and other buildings near the blaze.

Resident should expect more smoke Friday as the blaze continues to burn fuels like logs, trees and brush inside the fire perimeter, officials said.

Crews will also continue to work on firelines cut out by bulldozers to help prevent erosion later this fall when it starts raining.

On Friday, there will be more than 300 firefighters working on the Karney Fire. That number is expected to be reduced over the weekend if crews continue to make good progress.

Residents of Wilderness Ranch who were given a voluntary evacuation order earlier this week are now allowed to return if they can show Boise County Sheriff’s deputies proof they live there.