I don't get the connection. Were the occupants baking a pizza and it went very horribly wrong?

Or were they about to incriminate the Big Bad Don and their gas boiler was hit by a DEW?

Is it a threat against people who burrow too far into the rabbit hole, like "shut up or this happens"?

Basically, unless somebody knows the street and/or occupants and can adequately state as fact that they were, say, investigating Pizzagate, then it's nothing more than your typical gas blast. Or they were manufacturing heroin.