Nepal floods kill at least 273, more than 1,300 still missing

The search for hundreds of missing people continues this morning after a wall of water and mud tore through communities along the Nepal-China border

At least 160 people are dead. In Nepal, more than 1,300 people were reported missing, including hundreds of foreign nationals

At least 47 Americans are among them. Cars are buried. Debris is hanging from trees and power lines

In some places, the mud reaches the second floors of buildings. At least 19 bridges and about 25 miles of road were swept away

This man here says he ran to the terrace of his home as the flood rose all the way to the top floor

He says his wife was buried in the mudslide. He stayed on that terrace for hours before a helicopter finally reached him

And this video may be hard to watch. It's surveillance video from the border crossing

You can see people start running up the road. They have only seconds here to try to react

You're going to see the water and mud come around the corner on the left side of your screen

And within moments, the entire area disappears behind it. Buildings, cars, everything in its path is swallowed up

And a different view here coming up behind the building. Just incredibly shocking images

Almost too devastating to believe. Rescue crews are now airlifting survivors out of areas they can't reach by road

Nepal has asked both India and China to help with the rescue effort. Scientists believe an ice rock avalanche from a glacier high in the Himalayas triggered the flood

At one point, the Trishuli River rose as much as 27 feet in about half an hour