they issue extreme cold alerts for the homeless shelters. -10 is not so bad if you have a warm jacket and a place to get a hot chocolate after. it's pretty nasty, though, if you're stuck in it in a tshirt and have nowhere to stay.

www.theweathernetwork.com/news/articles/more-snow-on-the-horizon-for-ontario-and-quebec-up-to-10-cm/61803/