Megaboy does have academia behind him and his comments on the flood.
The best philology on the Noah narrative goes like this: a real man known as Noah, did save himself and his household and animals from a tragic but localized flood in the Mesopatamian basin, one that may have been extremely tragic to the surrounding communities. His survival therefore was likely attributed to divine providence as most cultures of the time would have done. End of original story.
Jump into the future at the time of the Babylonian captivity. Among other things Jews are appalled to discover from witnessing heathen worship is their own story of Noah turned into a horrendous tale explaining the superiority and non mercy of Babylonian gods. When Babylon falls, the Jews incorporate these details into the Noah narrative to tease the Babylonians because their gods proved failures. The heathen version is altered into a lesson that the G-d of Abraham and Sarah is not one that wants to flood the world with water like the heathen gods. The G-d of the Jews is one that redeems humankind and creation from tragedy, even promises not to allow such tragedy to repeat in the future.
The above is very simplified, you understand, but the theory does match what records this Mesopatamian flood infultrated and how critical analysis sees a pattern that allowed it to grow into legendary status among many cultures.