It's quarantined off, so it's not easy to get into. The hundreds, more like two or three thousand really, are screwed and nothing save for some deity making everything how it was can save them. In reality a mysterious enemy had killed Tox to rain his radioactive mass over Carter Hills to hide the existence of something. What it is we don't know yet, but Plex will be trying to piece the puzzle together. You can also introduce minor villains in the game if you wish....
~KL~
~KL~