1. Damage & Destruction Once the waves have knocked down infrastructure on the shore the waves continue inland for many more miles - obliterating yet more buildings and homes. As the water rushes across the land it can sweep away yet more trees, gardens, garages, cars and other man made equipment.
2. Death Hundreds and thousands of people are killed by Tsunamis.There is very little warning before Tsunamis hit. This means that people living in towns and villages on the coast do not have time to escape. People get hit by the waves, drowned or may even be electrocuted by wires in the water.
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3. DiseasesTsunamis flood the areas closest to the coast. This can cause disease to spread in the stagnant water. Illnesses such as malaria form when water is stagnant and contaminated. This can cause more death and sickness.
4. CostThere is immediately a massive cost when tsunamis happen. Rescue teams come in to the area and victims of the tsunami need to be treated. Governments around the world may help with the cost of bringing aid to a tsunami-hit area. There might also be appeals and donations from people to help out.