Tornado Threat for 75 Million Across U.S.

Some 75 million Americans are under threat of severe weather on Tuesday. People from the Great Lakes to the Gulf Coast, and from the Midwest to the East Coast, are advised to keep their eyes to the sky and their ears to the radio. The first two days of this powerful spring storm system, which is expected to rage into Wednesday, claimed 29 lives in six states. View the severe weather map on Weather Underground for current watches and warnings.