Wildfire in Michigan's Upper Peninsula destroys 34 homes and cabins May 29, 2012 -- Updated 1955 GMT (0355 HKT) Duck Lake Fire consumes nearly 20,000 acres Among the 97 structures destroyed are 17 campers, a motel, a store and 22 sheds The fire has burned 21,694 acres Crews have set up 40 miles of fire lines, but 21 miles are uncontained (CNN) -- The wildfire in Michigan's Upper Peninsula was 47% contained Tuesday, slightly worse than the prior day's 51% containment, as the conflagration has destroyed 97 structures, including 34 homes and cabins, a motel, and a store, authorities said. The Duck Lake Fire has burned 21,694 acres and is still going despite recent rains, the Michigan Department of Natural Resources reported on its website. The other structures lost in the fire are 22 garages, 22 sheds and outbuildings, and 17 campers, the agency said. Crews have about 40 miles of fire lines set up to try to control the situation, including six miles along the shore of Lake Superior, but 21 miles are uncontained, the agency said. A lack of roads in the area has complicated efforts. The fire's south end is about 14 miles north of Newberry and seven miles west of the Tahquamenon Falls State Park campgrounds. Lightning sparked the wildfire last Wednesday afternoon, leaving firefighters little time to contain it before dark. Dry conditions have exacerbated the fire danger throughout the region, but one-quarter inch to three-quarters of an inch of rain fell on the first late Monday, with more rain falling on the southern end of the wildfire, authorities said.