What is the “polar vortex”, which causes an extreme cold snap in the United States and Canada? – The HuffPost

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  1. What is the “polar vortex”, which causes an extreme cold snap in the United States and Canada?The HuffPost
  2. The northeastern United States and eastern Canada under historic polar coldfranceinfo
  3. The northeastern United States and eastern Canada in historic polar coldLe Figaro
  4. Down to -51°C: the United States and Canada are preparing for a historic polar coldSouth West
  5. Stalling the polar vortex: a feeling of -80°C on Mount Washington, “enough to die in a few minutesFree lunch
  6. See full coverage on Google News

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