Japanese Officials are now operating under the presumption that TWO reactors have either already melted down or are on their way to a meltdown. Critical core cooling systems have failed at both reactors. This situation has gone from bad to worse real quick.
Explosion at first plant
Throw on top of that, a 70% chance of another large quake hitting Japan, as CNN reports:
There is a 70% likelihood that Japan will experience an earthquake of 7.0 or above in the next three days, the country's meteorological agency said.