10 Worst Disasters of the Century - Detailed History - Future Lessons - Expert Interviews - Popular Mechanics

10 Worst Natural Disasters of the Century 1906-2005

Quite educational. The two worst weather-related incidents, in terms of loss of life, have long been forgotten except by historians. The first was the 1925 Tri-State Tornado (which seems to have been named rather poorly, since the article says it "whipped through four states.") The other was the New England Hurricane of 1938, which killed nearly 700 and left 63,000 people homeless.

Neither of those compare to the Spanish Flu epidemic in the WW1 era, which killed fifty million people, according to the article.