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Tsunamis
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Recovering from Disaster
Health and safety guidelines
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Tsunamis
Tsunamis also known as seismic sea waves, mistakenly called “tidal waves”, are a series of enormous waves created by an underwater disturbance. A tsunami can move hundreds of miles per hour in the open ocean and smash into land with waves hundreds of feet high.
From the originating areas, waves travel outward in all directions. The wave builds in height as it comes to shore, topography of the coastline and ocean floor manipulates the size of the wave. There may be more than one wave and the succeeding one may be larger than the one before.
Earthquake-induced movement of the ocean floor most often generates tsunamis. If a major earthquake or landslide occurs close to shore, the first wave of a series could reach the beach in a few minutes, even before a warning is issued. Areas are at greater risk if they are less than 25 feet above sea level and within a mile of the shoreline. Tsunami waves and the receding water are very destructive to structures. Other hazards include flooding, contamination of drinking water and fires from gas lines or ruptured tanks.
Know the Terms:

Familiarize yourself with these terms to help identify a tsunami hazard:
Advisory: An earthquake has occurred which might generate a tsunami.
Watch: A tsunami was or may have been generated, but is at least two hours travel time.
Warning: A tsunami was, or may have been generated, which could cause damage; therefore, people in the warned area are strongly advised to evacuate.

Take Protective Measures
What do I do During a Tsunami?

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

Save yourself and loved ones; possessions can be replaced


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.


What do I do After a Tsunami?

Stay away from flooded and damaged areas until officials say it is safe to return

Stay away from debris in the water
Follow the instructions for returning home.