The cold snap gripping many parts of the United States and Canada has
brought record-breaking icy temperatures lower than the surface of Mars.
The chill, which has been named the Polar Vortex, has brought in
frigid air from the Arctic. The town of Embarrass, Minnesota recorded
the lowest temperature in the U-S on Tuesday at minus thirty-seven
degrees Celsius. In Canada, Toronto's Pearson Airport temporarily halted
ground operations because of equipment freezing and concerns for the
safety of airport personnel. Wind chill factors as low as minus fifty
degrees Celsius plunged the western Prairies region into a deep freeze.
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