And as a person pointed out, the floods depicted in this article took place quite recently(from a hostorical perspective). The article says that in the Indian case the building were built between 1500 to 2000 years ago, and obviously the floods took place after their being built otherwise they would not have been affected by flooding.
Thus they were built around the time Christ was born, more or less. And, if Noah's flood did happen, i happened LONG before the birth of Christ!
IMHO i think what happened here is some widespread flooding that totally shocked the local populace, but clearly not a worldwide flood.
And as an interesting aside. It was noted by scholars that there are Babylonian stories that are doppelgangers of the story in Genesis, that were dated long before the Pentatauch (the first five books written by Moses...eg Genesis, Deuteronomy etc) were written. And to them the story of a flood is based on the Babylonian legends. Not my point but theirs!
Somewhere, I have an underwater map of the world during the Ice Age, with the world ocean levels reduced by 300 feet, it shows a lot of interesting things. It shows the Red Sea landlocked, the Persian Gulf is completely dry and numberous other things like that. The Red Sea (at some point) had to 'break-through' and re-connect with the worlds oceans, quite a flood, huh?
This scenerio probably played out many times around the world in the last 10k years and produced many flood stories. Most scientists agree that the worlds oceans were reduced, in the ice age, by 300-500 feet, with most accepting 400 feet.
I'd bet money that the Gulf Of Mexico was blocked off at one time also.