The extreme cold that gripped much of Ontario and Quebec yesterday remains in effect this morning.
Environment Canada has extreme cold warnings in place from the Manitoba border east through most of Ontario, most of Quebec, and parts of Nunavut and Newfoundland and Labrador.
"Bittery cold wind chills" near minus-40 are being reported across a huge swath of the eastern half of the country. Skin can freeze in minutes in such conditions. The risk for frost bite and hypothermia is elevated.
Environment Canada is warning travellers to keep emergency supplies in vehicles in this weather, including blankets and jumper cables.
The mercury is expected to begin rising later this morning.