I'm not sure what is going on at Fukushima but I've not seen such heavy steam in a quite a long time:
Yesterday I noted that the plant looked as if it were producing more emissions than typical. Today it really is steaming.
Netc is showing very elevated radiation levels in Japan. Here is a screen-capture from the animated replay:
I don't know if the higher levels are from Fukushima or from some other source of radioactive contamination.