Chicago firefighters battle a five-alarm blaze at a warehouse on the city's South side. See gallery.
Fire Department Lt. Charley De Jesus walks around an ice-covered warehouse that caught fire Tuesday night in Chicago. Officials said it is the biggest fire the department has had to battle in years and one-third of all Chicago firefighters were on the scene at one point or another trying to put out the flames. An Arctic blast continues to grip the Midwest and Northeast. Fierce winds have made some locations feel as cold as 50 degrees below zero.