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Some sun, then clouds; chilly
Mainly cloudy, a bit of snow
Times of sun and clouds
Chicago temperatures will rise toward week's end. more >
Aug 30, 2012; 5:00 AM ET
If you're longing to ski the Alps or swim in the Great Barrier Reef, you may be running out of time. A changing climate may beat you to the punch line. Valerie Smock has more.