> A highly populated area or industrious zone might get a rating that only a flood every 10.000 years is acceptable, while for some rural areas may get a rating

> A highly populated area or industrious zone might get a rating that only a flood every 10.000 years is acceptable, while for some rural areas may get a rating that a flood every 300 years is acceptable. Or until a king decides to flood the country to stop an army from advancing.