The polar vortex, briefly explained - Vox.com
- The polar vortex, briefly explained Vox.com
- Deadly polar vortex sweeping Midwest with wind chills as low as minus 65 CBS This Morning
- Polar Vortex to Grip Midwest With Most Extreme Cold in a Generation The New York Times
- Life-threatening cold entering Chicago area; CPS among several schools closed Wednesday WGN TV Chicago
- Polar Vortex Clobbers Midwest With Record-Breaking Cold HuffPost
- View full coverage on Google News