Many stories in the bible are simply the salt in the soup. What they believed in ancient time - the notion of God and universe - was a reflection to own experiences and accoglomeration of existing ideas - can't be our notion.
When a gospel writer wrote down the oral traditions or ranscripted an existing written story about Jesus in which e.g. Jesus once mentioned Noahs flood and compared that time with the end time in the future, this wasconly the salt in the soup of this comparison but not factual history.
Jesus used a hyperbole like Brother Lett when he spoke of paintbrushes that's it. A good story needs a hyperbole that is not true at all but arouses attention to the speaker