From what I've seen this morning it seems northern Japan will become a nuclear contaminated wasteland. This is a terrible turn of events. The Reactor is now completly exposed and the reactor containment roof was completely destroyed i.e. more than a purely chemical explosion as occoured at Chernobyl.
Hopefully the solution which stopped the China Syndrome at Chernobyl can be replicated. The consequences if they cannot will be absolutley catastrophic.