Imagine a wall of water over 1,000 feet high racing toward shore. This isn’t science fiction—it’s a potential reality. Scientists warn that parts of the U.S. could one day face mega-tsunamis, rare disasters caused not just by earthquakes, but by massive landslides or volcanic collapses.

What Is a Mega-Tsunami?
Unlike typical tsunamis caused by underwater quakes, mega-tsunamis result from enormous chunks of earth—like collapsing volcanoes or glaciers—crashing into the ocean. The resulting waves can tower thousands of feet and travel at jet-like speeds, devastating coastal areas.

High-Risk Regions: Alaska, Hawaii, and the West Coast