I feel sad when people use statistics like this. It makes no sense to call this 500 year flood because floods do not follow any kind of distribution. Not to men

I feel sad when people use statistics like this. It makes no sense to call this 500 year flood because floods do not follow any kind of distribution. Not to mention the human beings have been changing their environments drastically in last 200 years. NN Taleb would say this is fat tail event. It does not follow empirical distribution.