Record rains and flash flooding in the southwest. Homes have been evacuated. Dozens of people have been had to be rescued from the roofs of their cars. Ginger zee is watching it all. The one behind me... See More
Record rains and flash flooding in the southwest. Homes have been evacuated. Dozens of people have been had to be rescued from the roofs of their cars. Ginger zee is watching it all. The one behind me from las vegas. That's vegas? Yes. At least 50 people rescued and 1 person is still missing. The raine so fast and so hard, the rushing water burst through this dike in southern utah, forcing hundreds of homes and businesses to evacuate. In las vegas, a more desperate scene. The water, up to two inches per hour, turned roads into rivers in seconds. Trapping these cars. This man, barely hanging on, as he is rescued from the window of his truck and finally lifted into the air to safety. The water came bursting through neighborhoods, surrounding these homes in an instant. Flooding, not just basements but homes. Water just poured in from the roof. Reporter: The flood, so powerful, it sent dumpsters careening through a concrete wall. What happened? What did you hear? Just a roaring sound. And then, the crashing. Reporter: The torrent of floodwaters overflowing and swamping everything in its path. Washing away this tractor and the man who was in it. He's now reported missing. He was on the phone with his wife when the phone went dead. It came down hard and quick. I don't think anybody was prepared for exactly how bad it was going to be. Las vegas has never had that much rain on one day in september. Today, they will be drying out. Better news coming up. I'll have more on the nation's weather. Now, back to george and amy. Let's get to josh elliott
This transcript has been automatically generated and may not be 100% accurate.