This is total nonsense 1213, as any geologist, physicist, or biologist will tell you. Such a flood would have left massive evidence, would have baked the planet, killed off all life, and would not have been physically possible.
We have massive evidence, the modern continents, massive sediment formations, oil, gas and coal fields, marine fossils on mountain areas...
It would not have baked the planet, because the water cooled the planet and also made the movements softer. Think for example if you would throw a stone to Mariana Trench, it would not hit the bottom of it with same speed as in the case of same distance in the air. Water lubricates and makes things smoother. That is why there was not too high temperatures. But, obviousness there was also heat generated, hence the 40 days of rain.
How are the Jews evidence of an Egyptian captivity? The Egyptians don't mention them, they aren't pictured, no neighboring peoples mention them, no Hebrew bodies or DNA have been found.
How could they mention it? If Bible is true, those who could have told the story drowned, or were otherwise killed. What you says is basically the same as saying, U.S. didn't use nuclear bombs, because no one who died to the bombs wrote anything about the event.
The number of Hebrews fleeing Egypt would, from the biblical narrative, been as large or larger than the total estimated Egyptian population at the time, yet no historical mention of it exists outside the Pentateuch, and Egyptian history continues with no apparent disruption.
Where do you get the number of the Jews?
By what I see, Egyptian history is not continuous trough every year. however, I also think there is evidence for Jews. For example Senmut was probably Moses. Also the Joseph Stone seems to be talking about the same matters. However, were Jews called Jews in the time of Moses? Would Egyptians have called them Jews? I don't think so, therefore it can be difficult to notice anything from Egyptian history.
Exile: Two and a half million + people living for forty years in the desert would have left a lot of archæological evidence -- there is none. Such evidence exists for smaller tribes, but none for a large Hebrew population.
Why would it leave traces? What traces you think it should leave? Missing iPhones all over the desert? Please be reasonable.