I have a question about noah's flood.

[Tonus]

Maybe I missed it, but I was wandering how local floodwater could cover a local mountain.

Myths tend to stretch reality. We still do it today- pick up a comic book or an action movie and you will see humans doing extraordinary things and gods and goddesses doing miraculous things. We take things that we know and we experiment to see how far we can stretch them beyond what is believable. Heck, think about how often we exaggerate when we explain otherwise normal events. "Oh man, he knocked that guy into next week!!!" <-- that statement implies that punching people can achieve time travel.

It is no surprise that people who lived near areas that would routinely flood and occasionally experience massive floods would write stories about floods that didn't just overrun the river banks and destroy some houses, but that kept rising and did not abate until the whole world had drowned. I think that if those ancient people had heard some of these apologists explaining that the Earth was flatter so that mountains could be covered, they'd just shake their heads and laugh. "It's just a story, man. You future people sure are gullible!"