Disaster Supplies Kit
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Landslides and debris flow
Hazardous materials incidents
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Recovering from Disaster
Health and safety guidelines
Seeking disaster assistance
Coping with disaster
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
Advisory: An earthquake has occurred which might generate a
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.