I lived in the Asheville, Hendersonville, Greenville SC, corridor for 10 years. I do not remember any flooding at all.
If you live right next to a river or lake or reservoir, then there is obvious risk.
But, flooding from intense rain fall?
Wow. That's a new one for me.
It happens. This flood was due to snow pack then massive rain:
17+ inches over 3 days.