An exceptionally large storm causes a 100 year flood The term 100 year simplifies a flood that has just a 1 chance of occurring in a single year Mistakenly many assume that experiencing such a flood means they are safe for the next 99 years The probability of a 100 year flood remains constant at 1 each year Without preparation these rainfall events can be devastating to a community However effective stormwater management and planning can mitigate the potential damage
