Chicago braces for an arctic blast. Is the notion of masculinity under assault? Tax tips 101 for this filing season. And what data centers are – and why we need them.

• Snowstorm Likely a Prelude to More Dangerous Weather
• Chicago Could Break its Record for Coldest Temperature
• Chicago Mayor’s Race: Mendoza, Preckwinkle Spar Over Ethics
• Gillette’s ‘We Believe’ Ad Sparks Controversy, Dialogue
• It’s Tax-Filing Season. What You Need to Know About This Year’s Forms
• New Nonprofit Gives Old Furniture – and People – Second Chances
• Report: In Building Data Centers, Chicago Outpaced by Other Markets