Frozen wonders: see what the Polar Vortex has froze solid - USA TODAY

1. Frozen wonders: see what the Polar Vortex has froze solid  USA TODAY
2. Death toll in polar vortex rises to at least 21 as Midwest awaits thaw  Fox News
3. Polar vortex cold snap sets all-time cold records across the Midwest, kills at least 9  Axios
4. Chicago weather: Polar vortex 2019  Curbed Chicago
5. Over 20 dead in U.S. polar vortex, frostbite amputations feared  Yahoo News
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