Pennsylvania

Nobody's hot water tank is going to make this BIG of an explosion.

After all the tap dancing around, they'll wait till the interest dies does a bit, and THEN it's finally going to come out. The explosion is from an old gas well that was shut down improperly, and probably was leaking unnoticed for a few years.

There have already been explosions in Plum Boro (suburb of Pittsburgh) for exactly that reason. The oil & gas companies have been notoriously lax in shutting down old wells and the state has been way too lenient in holding them responsible for fixing the problem.

It's not fracking that caused this, by the way. It's the old style extraction wells that stopped producing, so they capped them and walked away. Some are over 100 years old, but most are more recent.