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…showed last 75 words of 542 total…the coast with tremendous amounts of energy. Tsunamis have great erosional effects, stripping beaches of sand that may have taken years to accumulate and undermining trees and other coastal vegetation. The fast-moving water associated with the inundating tsunami can crush homes and other coastal structures. Tsunamis may reach a maximum vertical height onshore above sea level of 10, 20, and even 30 meters. Leaving mass destruction behind them Tsunamis are a very real and very dangerous natural occurrence.