The 10 Worst U.S. Disasters of The Last Century By trina9 Mar 18, 1906 #10. San Francisco Earthquake More Information Aug 20, 1910 #9. The Big Burn More Information Jun 1, 1918 #8. Spanish Flu Pandemic More Information Mar 18, 1925 #7. Tri-State Tornado More Information Sep 21, 1938 #6. The New England Hurricane More Information Mar 27, 1964 #5. The Great Alaskan Hurricane More Information Apr 3, 1974 #4. Super Tornado Outbreak More Information May 18, 1980 #3. Mount. St. Helens Eruption More Information Mar 12, 1993 #2. Storm of the Century More Information Aug 23, 2005 #1. Hurricane Katrina More Information
