Timeline

20th century

1. September 8, 1941 – January 27, 1944★★★★★

   Siege of Leningrad

   German and Finnish forces besiege Leningrad for nearly 900 days; around a million civilians die, mostly from starvation.

   WarDisaster· Russia, Germany, Finland
2. April 26, 1986★★★★★

   Chernobyl disaster

   Reactor No. 4 of the Chernobyl nuclear power plant in Soviet Ukraine explodes, spreading radioactive material across Europe in the worst nuclear accident in history.

   DisasterTechnology· Ukraine, Belarus, Russia