I spent the night of January 2nd/3rd 2014 in a town called Val d-Or,Quebec (well north of Montreal). When I arrived in the town at about 6PM on the 2nd it was about -30F (don't know what that is in Celsius). It was cold! The first thing I did on arrival was go to a gas station.The first station I went to told me that their pumps weren't working...they were frozen. I got gas at the next one I visited.
Next morning,while checking out,the TV in the lobby said it was -40,as did the display on my dashboard (-40F and -40C are,I discovered on that very day,the same).
You talk about heat? Let's talk about cold in Montreal or Ottawa! ;-)