It was recently stated by someone that it is not worth designing protection against a 100 yr [COLOR=#009900 !important]hurricane[/COLOR] as such an event is not likely in one's lifetime.

What is the probability of one 100 yr hurricane in a 50 yr lifetime?

What is the probability of two 100 yr hurricane in a 50 yr lifetime?

What is the probability that more than two 200 yr events in a 50 yr lifetime?