Um, as someone who heats with electric, one winter can easily add up to $2000. And if you don't have it on budget (or have lost budget by not keeping up your monthlies) you can (I have) be slapped with an $800 bill twice in the space of two months. And hydro Quebec has no qualms about pulling your power with only one month of unpayment ... if your payment background is sketchy. Their only limitation is that they cannot, by law, cut your power during the heating season. But the instant that the heating season (and who decided this) is over, they can and do pull your meter.
BTW, my case. The first year when I bought my place. since I had no payment history with them, I wasn't eligable for budget. I seriously ate it that winter. Come spring, I still had $400 outstanding, and got a message that I had 30 days before getting cut off. No three warning. No grace period. No excuses. I made it, but it was seriously tight for a few months afterwards. Granted, at that point, my electric bills were $20 a month. Before next heating season, I was on budget, and I'm damn well not getting off it.