Sodom found?

[Anomalocaris]

Dracula was about filthy eastern european immigrants stealing all the good victorian women with their new wealth and strange sexual practices.

I point this out to explain how a story about a flood might be based on some actual thing..but that thing need not be an actual flood (and certainly wasn't, in the case of the deluge).  That story was borrowed to a significant extent..not only was there no global flood there was no flood even remotely close to such a thing in the region, and the story in the ot wasn't written by the inhabitants of that region at any rate.  It's the assertion of deed and title, plastered in many ways all over the ot.  Not just to all the land, but all of the animals in the land.

An actual global deluge is an impossibility.  But a regional deluge large enough to seem, even to migrating populations of hunter gatherers or members of fairly extensive trading networks,  to affect much of the known world is evidently not.   Vast floods of that scale is geologically well attested to have occurred over a hundred times across different parts of the world during the final 5000 years of recent ice age.   Black Sea in-fill hypothesis seriously and credibly proposes that one particular example of such regional deluge in the Black Sea basin is the actual event at the origin of the widespread flood mythology of the near East which Bible stole and claimed as its own.