I heard somewhere that I can't remember that when something good happens, it's the grace of God, and when something bad happens, he moves in mysterious ways. Take that as you will, but myself, from what I gather about it all, is that God doesn't generally interfere alot in human lives. I believe there was a reason that the world was flooded, that reason being that most humans had become so absolutely corrupt that it was a necessity. From what I remember of that, I don't think we're at that level right now, plus the whole never flooding the Earth again thing.