How does it work from an energy point of view. If a wave weighs ten tonnes per meter width per meter high, say, each collision needs to move increasingly large

How does it work from an energy point of view. If a wave weighs ten tonnes per meter width per meter high, say, each collision needs to move increasingly large amounts of water up like a hanoi tower (although some of the energy may come from vacating space going down). Is that energy coming from currents or the waves? Can you really get 100x bar a tsunami or similar?