So many indigenous cultures in places around the world have accounts of floods or destruction on previous society with a significant number of common elements, there would be more to the worldwide flood account than parabolic teaching just representing other things.
Local floods can be devastating and they couldn't view it from a plane.
The flood of the Euphrates River Basin in 2900 BC was 150 miles wide and 350 miles to the South towards the Persian Gulf. That was their whole world.