Floods happen when too much rain or water from a source invades an area where it has not been and should not be on land. When floods happen it can be caused from too much heavy rain or can be caused when a dam breaks and water flows too high downstream, there are many other reasons why floods can occur but these are some main ones. Floods are super devastating to the wildlife and enviroment around them. Floods are capable of downing plants and animals and can completely destroy towns and civilizations because of the water.