September 19, 2014; 11:01 AM ET
In keeping with tradition, temperatures will continue their up-and-down cycle during the second half of September around Philadelphia. 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.