Firefighters are trying to contain a wildfire that's burned a number of homes and structures near Menhaga in northwestern Minnesota. The Minnesota Interagency Fire Center says the blaze, dubbed the Green Valley Fire, has burned 3,000 to 4,000 acres since it started on private land around 3 p.m. Tuesday. It says an unconfirmed number of homes and other structures have been lost, and many other homes, cabins and structures are threatened. Crews plan to battle the wildfire from the air today. Strong winds, high temperatures, low humidity and dry vegetation contributed to the fire's spread Tuesday. Meanwhile, Minnesota's governor signed an emergency order yesterday to help the Minnesota Interagency Fire Center fight wildfires around the state.