Here is my favorite Flood Joke:
The Hand of God
There is a joke that has been around a long time about a man who gets stranded by a flood. As the waters began to surround his house, a man in a row boat came by. He told the man to get in and he'd save him, but the man said, no, he had faith in God and would wait for God to save him. The flood waters kept rising and the man had to go to the second floor of his house. This time a man in a motor boat came by to rescue him, but again the man said ‘no.’ He was going to wait for God to save him. The flood waters kept rising. By now the man was out on the roof. A helicopter then came by and lowered a rope, but the man refused help again. He had faith. He had such faith, he was sure that God would rescue him. Of course, the water kept rising and the man drowned.
When he got to heaven, he asked God where he went wrong. He had complete faith in God, but God had let him drown. "What more do you want from me?" asked God. "I sent you two boats and a helicopter."