Historical Basis for Flood Story?

I admit that I am unsure about the Biblical flood story as being perfectly accurate - that the whole world was entirely flooded with water from rains and "the founts of the deep." But it is also reasonable that there is historical precedent for the story, that it is more than just a fairy tale - I wasn't there, after all, so as to say this or that did or did not happen. This article in the New York Times describes a meteoric impact some 4,800 years ago that would have made a tsunami 600 feet high in the Indian Ocean.

4,800 years seems about right for Noah's day. Interesting.