Strange lights are visible on the Fukushima webcam still this morning, particularly over unit 4.
There has been ongoing discussion of observations of the webcams here at Enenews.
I don't know what is going on, but Chargedbarticle - relying on another webcam - noted increased amount of cement truck traffic headed in the direction of Fukushima. Nuckelchen posted a video here
Japanese citizens should increase their citizen radiation monitoring to see if radiation levels are rising downwind of the plant. Citizen documentation of rising levels is probably the most reliable method of determining whether or not events have indeed gone critical at the plant.
One of the greatest areas of concern is unit 4. You can see a reddish glow near the top of unit 4, to the left of the bright light in the 2nd and 3rd screen shot below. James offered his interpretation in the comments section of the video I posted yesterday here