Scientists Warn of Potential Mega-Tsunami Threat to US Coast

Imagine a giant earthquake happening off the coast of the US Pacific Northwest.

Scientists are worried this could cause a massive wave, a 'mega-tsunami,' that could be hundreds of feet tall.

This is because of something called the Cascadia Subduction Zone, a place where the ocean floor is pushing under the land.

A big earthquake there could cause the land to sink and create a huge wave that would hit cities like Seattle and Portland very quickly.

This is different from normal tsunamis because it could be much bigger and leave very little time to escape.

Scientists say we need to be ready by building stronger buildings, planning how to get people out of danger, and setting up early warning systems to save lives.