Now Playing

Record-Breaking 'Superstorm' Sandy Hammers Coast

Hurricane Sandy is already huge, powerful and deadly. Now meteorologists warn it's set to collide with cold air moving in from the arctic and a wintry storm blowing in from the west. NPR'S Joe Palca, Margot Adler and Joel Rose discuss the unusual series of events that helped create the "superstorm."

Trouble listening? See our technical support page.