In 2011 happened a horrible accident at the Fukushima I Nuclear Power Plant which was caused by the tsunami triggered by the earthquake on March 11, 2011 (taking away 18.000 lives).
According to Wikipedia:
The damage caused by the tsunami produced equipment failures, and without this equipment a loss-of-coolant accident followed, resulting in three nuclear meltdowns and the release of radioactive material beginning on 12 March. It is the largest nuclear disaster since the Chernobyl disaster of 1986 and the second disaster (after Chernobyl) to be given the Level 7 event classification of the International Nuclear Event Scale.
Horrible, just horrible : (