HAILEY, Idaho -- A playground for some and home to many, the Wood River Valley is on edge as a massive fire burns dangerously close to homes, stretching fire crews and keeping officials hopping.

Right now, the Beaver Creek Fire has burned 145 square miles, and has forced 2,250 homes into a mandatory evacuation order (full list of areas below). Another 7700 homes are under what is known as pre-evacuation, giving them time to pack up essential belongings and get ready to go at a moment's notice if the fire grows closer. A total of nearly 10,000 homes are impacted by the massive fire that a public information officer termed "a beast."

The large, unpredictable fire is burning through both sage and pine trees toward the resort areas of Hailey, Ketchum.  The area, known around the world as Sun Valley is anything but sunny -- socked in by a thick layer of soot and ash.

More than 800 state and federal firefighters were dispatched to the blaze in the affluent resort region. Crews from around the state and across the nation are working together to battle the nation's number one fire priority.

Throughout Friday and Saturday, the fire blew up, with very low humidity, winds and hot temperatures making efforts to protect lives and homes difficult. The fire started last week -- and so far has destroyed five structures including one home, but none since Friday.