Children and the elderly are particularly at risk, as they have less mobility, strength and endurance. Persons caught in the path of a tsunami often have little chance to survive - debris may crush them or they may drown. The nearby coastal population often has little time to react before the tsunami arrives. There, waves are highest because they have not yet lost much energy. Tsunamis typically cause the most severe damage and casualties near their source. A Pacific Ocean tsunami can affect the entire Pacific basin, while a tsunami in inland waters can affect many miles of shoreline. Swift currents commonly cause most of the damage from tsunamis. Instead, they come onshore resembling a series of quickly rising tides, and they withdraw with currents much like those of a river. Tsunamis do not resemble their usual icon, a towering wave with a breaking crest. ![]() Only as a tsunami approaches land does it become a hazard in shallow water, it gains height as its waves slow and compress. In the deep ocean, tsunami waves are relatively harmless. Setting off a series of waves that radiate outward like pond ripples. Or rock fall into an enclosed body of water, displace the water column, Main cause of a tsunami, although landslides and underwater volcanicĮruptions also can generate them. Or lowering of the earth’s crust during earthquakes are usually the Waves that threaten people and property along shorelines. Lakes are at risk from tsunamis, which are a series of extremely long The Pacific Coast, Strait of Juan de Fuca, Puget Sound, and large Although you likely wouldn't get an alert on your phone, you may still want to sign up for alerts to be warned about aftershocks, road closures and messages from your local emergency management.Check out mil.wa.gov/preparedness to learn about how you can prepare yourself and loved ones for tsunamis and all of Washington’s hazards.Make sure you and your loved ones have a go bag ready.Learn if you live, work or spend time in a tsunami inundation zone and make sure you know where the closest high ground is and the quickest route to get there.Learn about other natural tsunami warning signs here. Ground shaking may be your only warning of a tsunami.Here are steps you can take ahead of time: Learn about the latest maps from the Seattle fault. If you feel an earthquake, drop, cover and hold on, then evacuate to high ground and get as far inland as you can as quickly as possible. ![]() And it could happen before you could ever get an alert on your phone.
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