This is basically a blatant admission that the radiation leaks are going to continue way beyond 90 days.
TEPCO also says it now plans to cool the spent fuel rods within nine months. They're now basically shooting for the end of the year to try to make this happen. (http://www.usatoday.com/money/topst...)
So what happens if there's another tsunami between now and the end of the year? Fukushima is basically just FUBAR at that point, it seems. Because another tsunami wave would easily just rip out the spent fuel rods and wash the plutonium back into the ocean, unleashing vast amounts of radiation directly into the environment.