out-of-control infernos that grow in size and at speeds we've never seen before. >> warm weather, lower humidities, fuel moistures at historic lows all over the western united states. combine that with a little bit of lightning and you have a recipe for a big fire. >> reporter: 41 wildfires are raging across the west. >> fire's here, let's get them out. >> reporter: in montana alone ten blazes stretch resources thin. >> we're shorthanded because of the other fires in the area so we've been playing hop-scotch. going from one problem to another. >> reporter: at the northern cheyenne reservation, 186,000 acres have burned as firefighters battle flames in 106-degree heat. in utah, the wood hollow fire destroyed the paines' mountain home. >> i mean, it's just -- nothing left. nothing green. it's just -- burnt dirt. >> reporter: tonight, with heightened fire danger and the fourth of july, fireworks have been banned in several western states.