Dangers of tsunamis

Tsunami safety rules

When you feel a strong earthquake, or hear a tsunami warning, you should assume a dangerous wave is on its way. History shows that when the great waves strike, they claim the lives of those who have ignored the warning.
  • A strong earthquake felt in a low-lying coastal area is a natural warning of possible immediate danger. Keep calm and quickly move to higher ground, away from the coast.
  • Not all large earthquakes cause tsunamis, but many do. If the quake is located near or directly under the ocean, the probability of a tsunami increases. When you hear that an earthquake has occurred in the ocean or coastline region, prepare for a tsunami emergency.
  • A tsunami is not a single wave, but a series of waves. The first wave is not necessarily the largest. Stay out of danger until an "all clear" is issued by a competent authority
  • Approaching tsunamis are sometimes heralded by a noticeable rise or fall of coastal water. This is nature's tsunami warning and should be heeded.
  • A small tsunami at one beach can be a giant a few miles away. Don't let the modest size of one make you lose respect for all.
  • Sooner or later, tsunamis visit every coastline in the Pacific. All tsunamis, like hurricanes, are potentially dangerous even though they may not damage every coastline they strike.
  • Never go down to the beach to watch for a tsunami. When you can see the wave you are too close to escape.
  • During a tsunami emergency, your local emergency management office, police, and other emergency organizations will try to save your life. Give them your fullest cooperation.
  • Stay tuned to your radio, marine radio, NOAA Weather Radio, or television stations during a tsunami emergency. Bulletins issued through your local emergency management office and the National Weather Service offices can save your life
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