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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 Cold Weather Spreads East
By Monica Davey, Mitch Smith & Julie Bosman
A Merciless Cold Lingers in the Midwest
By Monica Davey & Julie Bosman