You simply are bowing to the religion of science..sorry..you are not being honest in saying that there is no scientific evidence for a worldwide floods. Either that or you are badly misinformed. Anyone can do a simple search on that and see it for themselves. I feel bad for you because you honestly are full of doubt and it is masquarading as knowledge. God bless...
I went to a Catholic grade school, high school, college and graduate school, and never was instructed in science class about a most remote possibility of a "great flood", some 4,800 years ago.
If you asked such a question in a 100 level, survey of geology class, you would be laughed at, just like you would be laughed at if you posited that man and dinosaur walked the earth at the same time.
It's not a "religion of science", it's a fidelity to common sense based on empirical evidence, not spiritual belief.