I remember 77/78 natural gas was in such short supply and so expensive that they shut down our junior high school for the the winter and made up a split session schedule for the high school building. High schoolers went from something ridiculous like 6:00 am to noon and then junior high kids went from 1:00 to 6:00 (I don't remember the exact schedule, but you get the idea).
Point is that it was cheaper to heat one building than two but you felt like shit coming home that late and I'm sure that the high schoolers hated going in that early. Real third world shithole country shenanigans those were.