How is the concept of a 50-year design recurrence interval explained to the general public?

Question

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The concept of a 50-year design recurrence interval is explained as a 2% chance storm event to the general public. For a 50-year recurrence interval, the probability of equaling or exceeding the resultant storm flow is 2%. A recurrence interval is not the actual interval for which a storm is expected to occur, but rather the probability that a storm event of a given magnitude is going to occur in any given year.

How Is the Concept of a 50-Year Design Recurrence Interval