The good news is it will eventually run out of water.
That would not be good news, as this is water they had been using to keep the damaged reactors cool. They better not run of water out until get the fuel out of them! With luck I may live long enough to see that reported. IIRC they hope to start removing spent fuel from the storage tank of reactor 4 in a year or so. That is the largest mass of the collective problem, although not the worst of the mass, and it should be the most straightforward to relocate somewhere safer, where ‘normal’ nuclear waste storage conditions apply.