Winds have been strong, in some cases blowing more than 70 kph (43 mph), which makes the wind chill much colder than the air temperature.

CNN: STORY HIGHLIGHTS

The wind has also been particularly strong, in some cases over 70 kilometers per hour (43 miles per hour), which makes the wind chill much colder than the air temperature.

CNN: STORY HIGHLIGHTS

That game still holds the record for coldest temperature, but not for wind chill.

FORBES: The NFL's Coldest Games

In the meantime, Weather Channel has used a simpler measure, called "feels like, " to express temperature in a temperature-like number, taking into account wind chill at low temperatures and humidity at high temperatures.

WSJ: In the Forecast: New Ways to Measure the Temperature

The wind chill today will slice us up - it's taking the temperature down to below -50C, so we have decided to take a day's rest to recharge our batteries and soothe the aches and pains.

BBC: Arctic diary: Explorers' ice quest