A one-in-100-year flood has (a) 1 per cent chance in any...
A one-in-100-year flood has (a) 1 per cent chance in any year. On some years all of the ducks line up together, so to speak.
A one-in-100-year flood has (a) 1 per cent chance in any year. On some years all of the ducks line up together, so to speak.