Scientists are raising concerns about a potential mega tsunami that could impact parts of the U.S., particularly the Pacific Northwest, Alaska, and Hawaii. At the center of the warning is the Cascadia subduction zone, a fault line stretching from Northern California to Vancouver Island. Experts say an earthquake in this zone could cause significant land sinking and trigger massive waves capable of devastating coastal communities.

A new study from Virginia Tech highlights how a major quake in the region could cause land to drop by up to 6.5 feet, expanding coastal flood zones and increasing the risk of widespread flooding. Researchers estimate there’s about a 15% chance of a magnitude 8.0 or greater earthquake occurring in this area within the next 50 years. Such a quake could result in a chain reaction of aftershocks, tsunamis, and long-term disruptions to infrastructure and housing.

Alaska and Hawaii are also on high alert. In Alaska, melting glaciers may increase the chances of landslides and tsunamis, while Hawaii’s history with collapsing volcanoes poses its own risks. Scientists recall that over 100,000 years ago, a massive wave believed to be over 1,000 feet tall hit the island of Lanai after part of a volcano collapsed. With volcanoes like Mauna Loa and Kilauea still active, the danger remains present.

All these regions fall within the Pacific “Ring of Fire,” a geologically active zone known for earthquakes and volcanic eruptions. While scientists can’t predict the exact timing of the next event, they encourage residents in at-risk areas to be prepared. Knowing evacuation routes, signing up for alerts, and having an emergency plan in place can make a significant difference in the event of a disaster.