Two powerful tornadoes take aim at a Nebraska farming community at the same time; bank employees take cover in a vault while a mother and her daughter are buried in the rubble.

Record-breaking floods devastate Nashville, Tennessee. A woman is rescued just as her house is about to go up in flames, and two teenagers trapped in their jeep are carried away by the current.

A mudslide in Washington State rips through a hillside community, killing forty three people. First-responders dig fifteen feet through the mud, finding some survivors in homes next to dead loved ones.

As Hurricane Harvey hammers Houston, Texas, it becomes the most extreme rainfall event in US history. In the midst of a storm, a harbourmaster in a Massachusetts town falls into the raging waters.

A flash flood in the Texas Hill Country kills thirteen people and destroys 350 homes; when a twister hits a small town in Mississippi, a family takes shelter in a diner's walk-in cooler. When they emerge, the town is gone.

Elite skiers on a back-country adventure are hit by an avalanche; the myth that a tornado can never strike in the mountains comes crashing down when a twister strikes a Kentucky town in the Appalachian foothills.