I can’t imagine anything naturally on site that is explosive like that.
Transformers will explode and burn.
I’ve seen transformers blow like that. It can get real hot..real fast.
Wife and I did a tour of the Hoover Dam...down inside. From what I remember, there are many huge power generators down there....lots of spinning parts. If one of those gave up the smoke...would not be pretty. Very interesting trip.
15. Perhaps a bunch of baked bean eaters who lit a match at their campsite!