1 Tsunami 2004
2 The Influenza Epidemic of 1918
3 September 11, 2001
4 The Dust Bowl of the 1930s
5 Hurricane Katrina 2005
6 The Hindenburg of 1937
7 Chernobyl 1986
8 The Great Fire of London, 1666
9 The 1989 Exxon Valdez Oil Spill
10 The Great San Francisco Earthquake of 1906
