It is considered the worst nuclear disaster Catastrophe in history and is one of only two nuclear energy disasters Catastrophe rated at seven—the maximum severity—on the International Nuclear Event Scale , the other being the 2011 Fukushima Daiichi nuclear disaster Catastrophe in Japan .

The tsunami caused Causation nuclear accidents , primarily the level 7 meltdowns at three reactors in the Fukushima Daiichi Nuclear Power Plant complex , and the associated Motion evacuation zones affecting Influence hundreds of thousands of residents .

Residents within a radius of the Fukushima Daiichi Nuclear Power Plant and a radius of the Fukushima Daini Nuclear Power Plant were evacuated Emptying .

The was a nuclear accident Catastrophe at the Fukushima Daiichi Nuclear Power Plant in Ōkuma , Fukushima Prefecture .