[Main thread: The GAE, the Flood, and 2 Peter 3]
As long as someone doesn’t suggest that the Regional Flood killed all of Adam’s descendants except for Noah and his immediate family, we should be quite fine with the usual parameters for the genealogical progression.
But let’s do the math for a Noah-centric cataclysm:
The usual timing for the flood is 1,650 years or so … which leaves us 4000 - 1650 = 2350 years to 1 BCE. Generally speaking, 2000 years is a reasonable time frame, even if we have to start all over with Noah and his children!