Firefighters are working to contain a smoky wildfire in northwestern Wisconsin that has consumed 8,700 acres, destroyed nearly 50 structures and forced dozens from their homes.

The Department of Natural Resources says the wildfire in Douglas County is about 90 percent contained Wednesday morning, meaning firefighters have stopped most of the fire from spreading.

DNR spokesman Kevin Harter says 47 structures were lost, including 17 homes, but that firefighters were able to save 77 other buildings. He says no one was injured in the fire.

Harter says 22 evacuees stayed overnight at a high school in Drummond, 60 miles southeast of Duluth, Minn.

DNR officials say the wildfire was first reported Tuesday near the Town of Barnes. Conservation wardens went door-to-door to alert area homeowners of the fire danger.