"Chicago Area Braces for Frigid Temperatures and Wind Chill Warnings"

A wind chill warning is in effect for the Chicago area until Tuesday, with wind chills potentially dropping as low as 40 degrees below zero. This has led to school closures, flight cancellations, and train delays. Residents are advised to avoid outside activity if possible and to wear protective clothing if they must go outside. The extreme cold is expected to continue through mid-week before a brief respite, followed by another round of Arctic cold.