Emissions have been heavier than usual the last week.
Since December 21 I've seen a police car parked blocking the road to the plant and a "pumper ship" in the harbor.
The cranes visible on TEPCO cam 4 were folded sometime over the last 24 hours. Compare these shots:
December 25 2:30 AM
Today, December 25 (in Japan) as recorded on the TBS cam (taken at same time as screenshot above) there is a pumpership in the harbor
(I refer to this ship type as a "pumpership" -- it has been sighted in the harbor many times over the years, particularly when emissions conditions appear worsening - but I am not certain as to its actual functionality).