So many people have asked me questions and, like the childhood game, as news gets around the details change until people tell me, "Hey, I hear your house exploded or something". So here are the actual facts, for those who care:
1. What exploded?
My well pump. Not my house, not my hot water heater. My well pump. The pump that pumps water from the well into the house and pressurizes the entire water system.
2. How on earth did your hot water heater explode?
It wasn't my hot water heater. It was my well pump. See above.