Update Sunday, Jan 12: Wind chill values will be near minus 40 in the Cariboo.

Environment Canada upgraded a special weather statement to an extreme cold warning early Sunday morning.

A period of very cold wind chills is expected,” the warning stated. “Bitterly cold arctic air will remain entrenched over the area for several days.”

Environment Canada said extreme cold warnings are issued when very cold temperatures or wind chill creates an elevated risk to health such as frostbite and hypothermia.

Previous Saturday, Jan 11: Temperatures will plummet to values not seen in years.

Environment Canada has issued a special weather statement for the Cariboo-Chilcotin and warns wind chill values are expected to reach between minus 30 and minus 40 through the central interior by Sunday morning due to an extremely cold arctic air mass.

School District 27 says parents must exercise discretion as to whether or not students should be sent to school when temperatures are low and conditions are hazardous.

School buses will not run when the temperature is minus 32 degrees or colder.