most devastating natural disasters
Calamities of the 20th and 21st centuries. CBC Arts Posted: May 08, 2008 12:44 PM ET Last Updated: Aug 30, 2010 2:17 PM ET. The following is a list of some of the worst natural calamities to strike the world since 1900. The list is by definition arguable. Earthquakes, volcanic eruptions, tsunamis, cyclones, hurricanes and other storms are all clearly natural phenomena. But the picture is less clear for disasters like floods and famine.