I am reading Isaac Asimov’s analysis of the old testament. He points out that no historical record on any continent in any time frame has a record of such a catastrophe. Nor is there any explanation for the biodiversity that shows no unexplained gaps, no geological record of a flooding (as opposed to meteorite strikes and volcanic eruptions), no explanation for the racial diversity.
It is an interesting myth I believed in as a young Catholic child. But it is only a myth!