God’s word makes it clear that there was only one “flood” which was actually much more than a flood; a complete re-structuring of the surface of the Earth.
Those that wish to believe the unbelievable nonsense that is thrust upon us by self proclaimed “scientists” that reject the scientific method in favor of their personal war against God may try to join them by making God’s word a lie.
That is, of course, a personal choice, not science.
So God's Word makes it clear that the earth was covered with water before the seven days of (re)creation and 1000 years before Noah's flood. (True) science, as always, eventually bears out the truth of the Bible.