GRANTSBURG, Wis. (AP) – Crews have stopped the spread of a fire that got out of control during a prescribed burn in northwestern Wisconsin.  Department of Natural Resources spokesman Kevin Harter says the DNR burn was supposed to be limited to 500 acres but burned an additional 600 acres on state land Tuesday.  The controlled burn was to restore wildlife habitat in Crex Meadows Wildlife Area north of Grantsburg.  DNR crews were able to stop the fire’s spread with help from Minnesota air mutual aid.  No structures were damaged and no one was hurt. The fire burned grass, marsh and some upland forest, including jack pine.  Conditions were warm and dry. Showers are expected to move in Wednesday evening.  Crews will continue working through the night.  Grantsburg is about 70 miles northeast of Minneapolis.