Tsunamis, also known as seismic sea waves, are most common along the Pacific coast, but can strike anywhere along the U.S. coastline. Tsunamis are enormous waves caused by an underground disturbance such as an earthquake. They can move hundreds of miles per hour, and hit land with waves topping 100 feet in height.
Local authorities may not immediately be able to provide information on what is happening and what you should do. However, you should listen to
Radio, watch TV, listen to the radio or check the Internet often for official news and instructions as they become available.