Earlier this morning I posted screen shots of the "steam" currently being released from the buildings here. There was a shallow, large earthquake (6.1 according to US Geological Survey) off the coast of Fukushima May 18. Tepco looked awfully steamy in a "yellow" way that day (see screen shot here)
There is no doubt that some of the "fog" we are seeing is actually radioactive steam from the plant. How radioactive is the steam? I don't know.
Enenews is reporting today on a Japan Times article that confirms what I've been saying (e.g., see discussion here): The plant requires constant cooling to prevent the fuel from erupting in fire and Tepco probably cannot prevent contaminated water from pouring into the sea, indefinitely:
Japan Times: Discharges of Fukushima nuclear material into Pacific “have effectively contaminated the sea” — Melted reactor cores will burn again if water not perpetually poured in — “Tepco proposing some of it be dumped into ocean”
The Pacific Ocean is imperiled but an open fire might be even worse for humanity than the contamination of the sea.