Honestly I think it's easier to feel irrationally safe about a 0.2% chance, especially if you leave out the "per year". "500-year flood" at least emphasizes th

Honestly I think it's easier to feel irrationally safe about a 0.2% chance, especially if you leave out the "per year". "500-year flood" at least emphasizes that it's not a question of "if", but "when".