Icicles form on a fire hose from single digit temperatures as Chicago firefighters battle a five-alarm blaze in a warehouse on the city's South Side, Bridgeport neighborhood Wednesday, Jan. 23, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)

Associated Press
Icicles form on a fire hose from single digit temperatures as Chicago firefighters battle a five-alarm blaze in a warehouse on the city's South Side, Bridgeport neighborhood Wednesday, Jan. 23, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)
Icicles form on a fire hose from single digit temperatures as Chicago firefighters battle a five-alarm blaze in a warehouse on the city's South Side, Bridgeport neighborhood Wednesday, Jan. 23, 2013, in Chicago. (AP Photo/Charles Rex Arbogast)
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