Kinda puts the old religous flood stories in a different context eh? There were almost certainly costal communities who were consumed by rising sea levels the world over. Recent global flooding.
The most likely origin of the middle eastern religious “meme” of the flood (Noah etc) is Sumerian plain floods (Mesopotamia). In fact, the stories in Genesis are most likely the retelling of Sumerian technological achievements (farming, building and the concept of time and seasons).