The Asahi Shimbun is reporting more details on the ice wall failures during the most recent typhoon:
Kohei Tomita. Sep. 2 2016. Typhoons cause ‘ice wall’ to melt at Fukushima nuclear plant. The Asahi Shimbun, http://www.tepco.co.jp/en/nu/f1-np/camera/index-e.html
The plant does not look any different on the cams.Rainfall from recent typhoons caused partial melting of the “ice wall” at the Fukushima No. 1 nuclear plant, allowing highly radioactive water to leak from around the damaged reactor buildings... [TEPCO] said melting occurred at two sections of the ice wall, which is designed to divert groundwater away from the reactor buildings. TEPCO officials believe that during the latest typhoon, contaminated water from around the reactor buildings flowed through openings of the ice wall created by the deluge and reached downstream toward the sea.