ELI5- How does only 17″ of rain cause multiple feet of floodwater?

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My little girl is 7 and just isn’t wrapping her head around this and I need to find a better way to explain this.

She is so so smart because she saw the coverage of Helene, and heard 17″ and hot confused.

I told her the water runs from the high places to the low places, but then she asked why the water doesn’t leave the low places and why is it still flooded.

I’m bad at dumbing things down.

In: Planetary Science

17 Answers

Anonymous 0 Comments

17″ of rain is 17″ *everywhere*.

It has to go somewhere.

If you have 50% of the land at 50 feet above sea level, and the remaining land is 75 feet above sea level, then the parts that are 50 feet above sea level are going to have three feet of water on them.

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