A tsunami is a big massive wave that destroys houses kills people and ruins millions of people's lives.a tsunami occurs when the two tectonic plates rub together and make a earthquake under the water.
how to know when a tsunami is coming; when a tsunami is coming you will see the tide go out really quick so if you ever see that happen alert everybody and go to the tallest building you can see and wait till the tsunami is over.
what were the effects of the tsunami? the effects were millions had died houses has been destroyed people were homeless people had no jobs they had no family no friends.
how we can prevent a tsunami; we can fully stoip