Solar Minimum = CHICAGO COLDEST EVER? FROSTBITE IN MINUTES! -60° WIND CHILL MINNEAPOLIS

Solar minimum  is the period of least solar activity in the 11 year solar cycle of the Sun. We are currently in that period. The result? 

Chicago's record for coldest temperature ever could fall as polar vortex has city 'in the crosshairs'

https://www.chicagotribune.com/news/local/breaking/ct-met-chicago-cold-weather-20190127-story.html

Polar vortex to bring prolonged, life-threatening cold outbreak to midwestern US this week
https://www.accuweather.com/en/weather-news/polar-vortex-to-bring-prolonged-life-threatening-cold-outbreak-to-midwestern-us-this-week/70007262

Coldest Arctic Outbreak in at Least Two Decades is Expected This Week in Parts of the Midwest
https://weather.com/forecast/national/news/2019-01-21-arctic-cold-midwest-east-south-late-january