Roaming the web at random I come across a guy in Tokyo taking radiation measurements with a personal dosimeter.  The air is fine.  But the ground is not fine.  Tokyo is getting repeated dustings and the radiation is accumulating.  Meanwhile, the reactors are out of control, and there is no end in sight.  So, yes, I expect things to get worse.  

I am not sure Tokyo will be evacuated.  It may instead be abandoned.  The Japanese Government may never admit a thing, ever.  It's a possibility.  

The Fates are kind.