[legion]

https://chicago.cbslocal.com/2019/01/29/chicago-weather-forecast-extreme-cold/

— It will be so cold outside that you shouldn’t talk.

That’s the warning from the National Weather Service as potentially record-breaking cold slams Chicago and the Midwest.

In addition to the usual dress in layers and cover your mouth warnings, the NWS in Des Moines said, “to protect your lungs from severely cold air, avoid taking deep breaths; minimize talking.”