Gen 7:21-23
21 Everything died. Anything that moved — dead. Birds, farm animals, wild animals, the entire teeming exuberance of life — dead. And all people — dead. 22 Every living, breathing creature that lived on dry land died; 23 he wiped out the whole works — people and animals, crawling creatures and flying birds, every last one of them, gone. Only Noah and his company on the ship lived.

This was just like the day of judgment will be.