No global flood ever happened. It's impossible, and it's not in the geological record.
A flood, however, well could have wiped out the world of the ancient Israelites. That is, when we know what their world was.
The Bible is truth to its adherents and in its proper contexts. Why Spaz or anyone else would carry on as if the entire Old Testament is about a literal worldwide flood is an argument that's just not worth entertaining.
There could have been global flooding events but not the entire world submerged in water. I believe the allegorical account of a world wide flood was an event that was cause by an asteroid strike in the polar region which was a global climate altering event which would have cause widespread rain around the globe that was so far outside of the norm of typical flooding events that it was noteworthy and that is the reason so many ancient cultures have an account of a flood.
advances.sciencemag.org
Does the rain from this asteroid strike that the ancient Near Easterners write about coincide with an intense downpour that the Egyptians write about? The Incas? The Chinese? Did an asteroid strike occur some 3.5 to 4 thousand years ago that flooded the earth? Is that what the evidence says?
The ancient Israelites cared not a whit about the Amerindians or the Aboriginals or the Pygmies, and didn't even know about them. Their world was Palestine, a disc that rested on pillars.
But more than geography, their world was covenant. Every time in their scriptures/history that God created a new heaven and earth, He did not create a new planet. Heaven and earth are people, the ruling places and the citizens, the altar and the sea.
The planet is immaterial, and so is science.