(TOKYO) -- Japan's Nuclear and Industrial Safety Agency elevated the level of severity of the nuclear crisis in the country from a four to a five Friday as workers continued to battle the crippled reactors at the Fukushima Daiichi plant.
The latest rating is based on a seven-level scale and is equivalent to the level of the Three Mile Island accident that happened in the United States 32 years ago.
Meanwhile, at the nuclear power plant, efforts were under way Friday to reconnect electricity to cooling systems and to spray more water from the ground. Seven water-spraying trucks targeted the plant's unit 3 reactor, entering one at a time to fire their water cannons.
Additional volunteers also joined Japanese military and emergency crews working to prevent a nuclear meltdown.
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