I am skeptical of the notion that all flood stories relate to a common event, or even to the same kind of a flood. After all, hurricanes and devastating storm surges are a feature of that part of the world. A really bad one could inspire a flood myth, connecting a natural event to the workings of the supernatural realm.
I am skeptical of the notion that all flood stories relate to a common event,
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Around 12,800 years ago sea level rose 400 feet world wide almost over night.