I couldn't see where a town had been swallowed. The hole looks to be in the middle of swampland
Today it covers more than 24 acres and is an estimated 750 feet deep.
OK, people were evacuated, but was that as a precaution or are their houses gone? I don't understand why a link to oil and gas was made (very briefly).
From what I understand, the ground isn't stable and the area is pretty toxic. Plus, it's probably a good idea to leave your home before it possibly gets swallowed instead of waiting to see what happens. Also, there's nearby pipelines and underground storage areas that could be compromised by the unstable ground and you don't want to be near those when/if they go to shit.
Basically unregulated industry has killed the place just like West Virginia, etc. if you can't find any links to oil and gas industry in this situation, then I'm not sure you're really looking.
Also, once a hydrocarbon smell resembling diesel fuel hits your nose, you tend to want to get away.