- Weather update: Friday classes canceled news.wisc.edu
- Chicago-area schools announce closures, shifts to E-learning due to extreme cold fox32chicago.com
- Chicago weather forecast: Chicago Public Schools cancels classes ahead of Extreme Cold Warning Friday for Cook County, IL abc7chicago.com
- How cold does it have to be to cancel school? How to check as brutal blast nears nbcchicago.com
- Businesses, services close Friday for extreme cold channel3000.com