1987 and 2025
100-yr flood doesn’t mean it happens every 100 years, it means that the probability of it happening in a given year adds up to once every hundred years.
Like if you roll a 100-sided die 100 times, statistically each number is rolled once, but in reality any single given number (your flood) will be rolled multiple times before each number shows up at least once.
[This was a 1 in 100 year flood.
1987 and 2025]
I wish people would stop saying 1 in 100 year that’s not scientifically correct at all. It’s 1:100 probability in any given year. As in a 1% probability in ANY year of occurrence.
It’s the same as roulette with a 1:37 probability of any number coming up. I have seen 27 red hit 4 times in a row and made 10 grand on letting the winnings ride each of the times up to the table max limits by the third roll... 35:1 = $175 first hit, $100 table max bet 35:1 = $3500 pay out, third hit $3500 never ever move a winning bet. Fourth hit $3500 ..let it ride fifth roll 11 black had a nickel on it for $175 but lost the $100 on 27.
People would incorrectly say the odds of four 27 red in a row is 37^4 or 1.8 million to one and they would be wrong. It’s always 1:37 odds every single spin. Needless to say steak dinner was on me that night in Vegas.