http://www.cnn.com/2011/WORLD/asiapcf/03/28/japan.nuclear.reactors/index.html?hpt=T2

Japan officials found water that had high levels of radiation. The Japan officials dont have a clue on how the water got outside the plant and into the tunnel. Japan officials are working on a solutiobn to fix the problem. It is at high levels of radiation that could be harmful.