Throughout history pundits have been predicting doom. Here is a summary of some of the recent predictions of doom.

http://www.godward.org/commentary/Out%20of%20the%20Box/Apocaholics%20Anonymous.htm

By the way, as is pointed out in this article, despite Al Gore's wishes, the hottest summer on record in the United States was 1936. Back then, Oklahoma almost dried up and blew away.