Firefighters spray down hot spots on an ice covered warehouse that caught fire Tuesday night in Chicago, Jan 23, 2013. Fire department 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 gripped the US Midwest and Northeast Wednesday, with at least three deaths linked to the frigid weather, and fierce winds made some locations feel as cold as 50 degrees below zero Fahrenheit (minus 46 Celsius). [Photo/Agencies]