Workers were evacuated from the Fukushimah Daiichi nuclear plant after smoke started pouring from reactors 2 & 3.  Planned water spraying had to be stopped.

White smoke/steam coming from reactor 2, from a crack in the roof, it is probably from the spent fuel pool.

Reactor 3 more serious; black/gray smoke coming from whats left of the reactor (reactor 3 exploded last week).

There is speculation that the smoke might be related to the recently increasing radiation levels.