It's going to be extremely cold out for the rest of this week. Indeed, Peterborough Public Health has issued the second Frostbite Alert of the season because of forecasted nightly wind chill values of -27 or lower from December 26th to 29th.
Extreme cold events are a potentially significant health risk and can have a severe impact on the health of vulnerable populations including infants, the elderly, people with circulatory problems, and the marginally housed.