The sun is seen through billowing steam that is being released from an office building on Thursday, Jan. 24, 2013, in Albany, N.Y. A polar air mass trekked from the Midwest into the region on Wednesday, prompting the National Weather Service to issue wind chill warnings across upstate New York and northern New England. The coldest weather was expected Wednesday and Thursday, after which conditions should slowly moderate before returning to normal, said John Koch, a meteorologist with the National Weather Service regional headquarters in Bohemia, N.Y. (AP Photo/Mike Groll)