How does Creation predict a global Flood?
Gen 6:11 The earth also was corrupt before God, and the earth was filled with violence. 12 And God looked upon the earth, and, behold, it was corrupt; for all flesh had corrupted his way upon the earth. 13 And God said unto Noah, The end of all flesh is come before me; for the earth is filled with violence through them; and, behold, I will destroy them with the earth. ... 17 And, behold, I, even I, do bring a flood of waters upon the earth, to destroy all flesh, wherein is the breath of life, from under heaven; and every thing that is in the earth shall die.
Genesis records both the prediction of the flood to Noah and the flood itself. Based on that record of the past, Creation Science predicts that evidence of a monumental water catastrophe will be found.