Tsunamis, also known as seismic sea waves, are most common along the Pacific coast, but can strike anywhere along the U.S. coastline, even in Delaware. 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. Think it can't happen here? It can.
If you are on the beach or other low-lying area close to the ocean or bay, immediately evacuate by walking to higher ground if:
- Officials issue a tsunami warning and order evacuations
- The earth shakes so much that you can’t stand
- Shaking lasts longer than 20 seconds
- You notice water receding from the shoreline
During a Tsunami
- The following are guidelines for what you should do if a tsunami is likely in your area:
- Turn on your radio to learn if there is a tsunami warning if an earthquake occurs and you are in a coastal area.
- Move inland to higher ground immediately and stay there.
- CAUTION - If there is noticeable recession in water away from the shoreline this is nature's tsunami warning and it should be heeded. You should move away immediately.
After a Tsunami
- The following are guidelines for the period following a tsunami:
- Stay away from flooded and damaged areas until officials say it is safe to return.
- Stay away from debris in the water; it may pose a safety hazard to boats and people.
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