The Church does not have a teaching on the Flood. Catholics are free to accept the basic three theories:
That the story is literally true.
That the story is not literally true but is included in the Scriptures to teach us valuable theology about who we are and God’s relationship to us.
That the story, while primarily poetic and non-historical, is based on an actual ancient flood and uses literary style to make theological points.
Focusing on whether something happened in a literal historical manner misses the point of what the Scriptures are. The Scriptures are not some dry history lesson, they are God’s revelation of Himself, His will, and our destiny. Historical events that are told as literal history in the Scriptures are not included because they are historical but because they tell us something about God.
DISCLAIMER: Catholic Answers has turned over the archive to Catholic-Questions.org and no longer owns, manages, or moderates the forums. For additional apologetics resources please visit www.catholic.com.