All U.S. ocean coasts can be impacted by tsunamis. Some areas have more risk than others. Over the past 150 years, destructive and deadly tsunamis have struck Hawaii, Alaska, California, Oregon, Washington, American Samoa, Puerto Rico, and the U.S. Virgin Islands.
Are you in the Zone?
A key step in being prepared for tsunamis is to find out if your home, school, workplace or other frequently visited places are in a tsunami hazard or evacuation zone and if your community has had tsunamis in the past. The National Tsunami Hazard Mitigation Program provides maps of various states and territories of the United States. Your local emergency management office, your state or territory's geologic or tsunami hazard website and your local National Weather Service Weather Forecast Office are also good resources for information about your risk. These are listed below by region.
Tsunami Inundation and Evacuation Maps
MyHazards from Cal OES (click "Tsunami Risk" at top)
Tsunami Maps from the California Geological Survey's Information Warehouse
Tsunami Evacuation Map (click "Guam" at top)
Gulf Coast Tsunami Inundation Maps
Tsunami Evacuation Map
U.S. Virgin Islands
Tsunami Evacuation Maps from VITEMA
Washington State Department of Natural Resources Tsunami Evacuation Maps
Evacuation maps are also available as an app for both Android and Apple.
Also, find out if your community is TsunamiReady. Communities recognized by the National Weather Service as TsunamiReady are better prepared for tsunamis.
Understand the Warnings
There are two ways that you may be warned that a tsunami is coming: an official tsunami warning and a natural tsunami warning. Both are equally important. You may not get both. Be prepared to respond immediately to whatever you hear or see first.