Operator TEPCO said a fuel rod meltdown could not be ruled out

The Fukushima plant has been hit by two explosions at buildings housing two reactors since a massive 9.0-magnitude earthquake hit on Friday, and the cooling system at a third reactor stopped working on Monday.
Operator TEPCO said a fuel rod meltdown could not be ruled out after cooling water levels dropped sharply at the No. 2 reactor, according to Jiji Press. A meltdown could release radioactive material into the air.
TEPCO said that more than 12 feet of the No.2 reactor's four-metre fuel rods were exposed to the air as of 8.07 pm (11.07AM GMT), before the pumping of seawater resumed in an attempt to cool them.
But chief government spokesman Yukio Edano said that ongoing work to cool that reactor would hopefully stabilise the situation.