That's a pretty broad question, and the fact that you're asking it in the way you are immediately makes me think you are sitting on something you recently learned about or remembered that you think can present a decent argument on the premise. Alright, i'll bite.
From what I have researched, it seems that in the many many ancient texts by many authors that were compiled into what is now the Bible, over the course of a couple thousand years, that actual natural disasters, "acts of god" (if you will) that actually happened and are verifiable through studies of geology and archaeology, are referenced in these texts. I don't believe the Bible is a fictional book straight out someones (or many peoples) imagination alone; I believe that things that happened to said individuals were interpreted at the time of writing to be miraculous, when in fact they are not.
In short, I have no doubt the Bible has some basis in factual events; the same way this book (
Abraham Lincoln, Vampire Hunter ) probably references actual things that happened in Lincolns lifetime, although obviously vampires don't exist. That's just the first example that comes to mind, and obviously a bit of a joking reference to what you might be inferring, but the point stands; Actual historical events can easily be turned into the equivalent of "tall tales" over hundreds of years of mistranslating, misinterpretation ("literal" vs. "figurative" -- apologists two favorite words) , word of mouth, and storytelling. An actual, devastating flood that wiped out entire regions of livestock and homes can easily turn into a worldwide, life-eradicating flood that lasted 40 days and 40 nights.
That being said, a very intelligent coworker of mine who I discuss religion with from time to time has done much research on the subject (both inside and out of the seminary), and claims he has seen and translated some of these texts himself (copies, i'm sure...), and I can't remember off the top of my head, but he basically says the Messianic prophecies in the Bible have held true to actual historical evidence. This is a subject i've been meaning to research recently, after discussing it with him:
yet haven't got around to quite yet. I've been pretty busy.
So, why do you ask?