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Residents across Midwest capture effects of polar vortex 01:06 Now Playing
How to keep pets active indoors during the polar vortex 01:27 UP NEXT
Town of Hell, Michigan freezes over in polar vortex 02:01
Leaking water tower coats Minnesota town streets with ice 01:53
Chicago residents capture strange results of record low temps 01:01
Bone-chilling cold in the U.S. sparks climate change skepticism as experts speak out 01:19
More than 200 million Americans hit with freezing temperatures 02:31
How the polar vortex works and why 00:44
Chuck's winter vortex tips: Stay warm, stay safe, keep your corneas toasty 01:54
Temperature plummets to dangerous levels not seen in decades 02:12
Al Roker calls Kentucky’s Matt Bevin a ‘nitwit governor’ over school closures 00:31
Chicago crews set train tracks on fire to combat freezing temperatures 01:03
Chicago crews set fire to train tracks during freezing temps 01:04
Forecast: How bad will the freezing temps get? 01:53
Extreme cold prompts cancellation of upper Midwest mail delivery 01:19
How to keep pets active indoors during the polar vortex 01:27 Despite the bone-chilling cold gripping most of the country, pets still need exercise, even if it can't happen outdoors. WHO's Maria Lisignoli reports. Jan. 31, 2019
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Residents across Midwest capture effects of polar vortex 01:06 Now Playing
How to keep pets active indoors during the polar vortex 01:27 UP NEXT
Town of Hell, Michigan freezes over in polar vortex 02:01
Leaking water tower coats Minnesota town streets with ice 01:53
Chicago residents capture strange results of record low temps 01:01
Bone-chilling cold in the U.S. sparks climate change skepticism as experts speak out 01:19 
