As temperatures get ready to plummet, Environment Canada has issued an extreme cold weather warning for most of the province.

The weather authority says a cold arctic air will return to the region on Sunday, bringing a northwesterly wind and “possible record setting minimum temperatures.” Environment Canada is predicting temperatures between -30 C and -40 C overnight with the wind chill.

The extreme cold weather warning has been issued for the following communities:

  • Barrie - Collingwood - Hillsdale
  • Midland - Coldwater - Orr Lake
  • Orillia - Lagoon City - Washago
  • Innisfil - New Tecumseth - Angus
  • Orangeville - Grand Valley - Southern Dufferin County
  • Shelburne - Mansfield - Northern Dufferin County
  • Dunnville - Caledonia - Haldimand
  • Caledon
  • Bracebridge - Gravenhurst
  • Huntsville - Baysville
  • Port Carling - Port Severn
  • Town of Parry Sound - Rosseau - Killbear Park
  • Newmarket - Georgina - Northern York Region
  • Uxbridge - Beaverton - Northern Durham Region
  • Vaughan - Richmond Hill – Markham

Environment Canada warns that these freezing temperatures can pose a serious health risk. In some cases, people exposed to the extreme cold for a long period of time can suffer from hypothermia and frost bite.