As we come on the air it is man versus nature and there is a map that se it all, a giant wildfire spreading through idaho and watch it grow over this weekend. Bearing down now on sun valley and the... See More
As we come on the air it is man versus nature and there is a map that se it all, a giant wildfire spreading through idaho and watch it grow over this weekend. Bearing down now on sun valley and the vacation homes, the giant mansions of the rich and famous there. Veteran firefighters are calling this fire a beast and abc's aditi roy is right there with them. Reporter: The beaver creek wildfire burns deep in the hills near sun valley idaho and 1200 crews attacking the flames and smoke from above and below. Firefighters are work is against hot, dry weather and wind gusts turning the fire into tornado-l tornado-like spirals. They are putting in a sprinkler system to protect the homes but most work is done with hand tools. They're digging away trees and anything flammable to make sure flames don't burn beyond this point. It's slow and labor intentative work. Close to 10,000 homes at risk, among them some of the most expensive homes in the country, multi-million dollar mansion. Bruce williss vacation home is now less than a mile away from the zone. Arnold schwarzenegger owns a multi-million dollar estate six miles from the fire line. Private fire companies are hired by insurance companies. I understand why insurance companies sent us to protect these high value homes. I get that and I don't have any problem with it as long as they stay out of the way of our fire operations. Reporter: Farmers insurance millions of dollars worth of homes in idaho. Any insurance company is going to want to do that. Reporter: Authorities tell me there are about 12 of these private outfits servicing the area. We're standing in front of the hot spot of the moment right now timber gull much. You can see the smoke behind me but there could be relief in sight, a chance of rain tomorrow. Let's hope for that. Thank you.
This transcript has been automatically generated and may not be 100% accurate.