We're going to move to the fast-moving wildfire, threatening the mountain resort town of park city. The fire spreading as we speak. Forcing hundreds of families to evacuate. Destroying a dozen homes.... See More
We're going to move to the fast-moving wildfire, threatening the mountain resort town of park city. The fire spreading as we speak. Forcing hundreds of families to evacuate. Destroying a dozen homes. Alex perez is on the ground for us there. Good morning, alex. Reporter: Good morning, lara. This morning, this fire is about 25% contained. Authorities say at one point, it was so fast, it was moving 50 feet to 80 feet per minute. This morning, utah firefighters battling this fire near park city, utah, home of the sundance film festival, are finally gaining ground on the films. Fire has destroyed more than a dozen homes and threatened hundreds of others. There's a lot of people in tears. A lot of people scared. Reporter: Including the 250 families forced to evacuate in a panic. It had burned pretty much all the way down the street to our house. Reporter: The blaze has already torched more than 2,000 acres. Blackhawk helicopters, dousing the fire from above. It's believed lightning from a storm tuesday sparked the inferno. When the lightning struck, how quickly did this fire move? Faster than a person could run. Reporter: Complicating the situation, these twister-like flames, rarely caught on camera. They're called fire whirls and can help the fire spread. This one spotted in utah. We're getting adequate resources. But with all of the fires nationally, it's a difficult time to get crews in. Reporter: It's been a tough season for firefighters, unlike the eastern half of the country where many cities are having the wettest summers on record. The west and southwest are coping with unusually bone-dry conditions. 36 fires burning across 9 states. And authorities here in utah believe they can have this fire 50% to 60% contained by the end of the day. At this point, it's still unclear when those 250 families that had to evacuate might be able to get back home.
This transcript has been automatically generated and may not be 100% accurate.