Arctic blast tied to polar vortex puts U.S., Europe in deep freeze - Axios
- Arctic blast tied to polar vortex puts U.S., Europe in deep freeze Axios
- Multiple Arctic outbreaks to affect more than 250 million in central, eastern US into mid-January Yahoo! Voices
- Polar vortex to bring freezing weather to US BBC.com
- Temperatures Plummet Due to Arctic Blast To Kick Off The New Year The Weather Channel