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Polar vortex death toll rises to 21 as US cold snap continues
75% of the US population will suffer below-freezing temps this week
By Holly Yan & Emanuella Grinberg
Midwest Bracing for Antarctic-Like Weather
By Mitch Smith
Polar Vortex Triggers Coldest Arctic Outbreak in at Least Two Decades in Parts of the Midwest
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A Closer Look at the Polar Vortex's Dangerously Cold Winds (Published 2019)
By Jeremy White, Karthik Patanjali & Evan Grothjan
Polar vortex: As many as six deaths, USPS delivery suspended, school canceled across Midwest
By Angela Fritz, Katie Mettler & Amy B Wang
Polar Vortex Hits The Midwest With Life-Threatening Cold Temperatures
By Shannon Van Sant
Extreme weather is so bad in some parts of the country, even the US Postal Service won't be going out
By Steve Almasy, Christina Maxouris & Holly Yan
Extreme Cold Weather Spreads East
By Monica Davey, Mitch Smith & Julie Bosman
A Merciless Cold Lingers in the Midwest
By Monica Davey & Julie Bosman