The National Weather Service issued multiple tornado and severe thunderstorm warnings early Saturday for areas in Alabama, Kentucky, Mississippi, Tennessee, Illinois, Indiana and Texas.

The threat of tornadoes in parts of the U.S. proved deadly as whipping winds moved east into the Mississippi Valley and Deep South on Saturday, with at least two people killed in south-central

A powerful system of storms is sweeping across the Midwest and South, raising tornado warnings. In Texas, wildfires erupted and high winds caused three fatal crashes, officials said.

An "outbreak" of tornadoes and severe thunderstorms is expected through Saturday night in Alabama, Mississippi, Louisiana, and other southern states.

A line of storms will move into metro Atlanta on Saturday and Sunday with hail, damaging winds and tornadoes possible. Here's what to know about the causes of tornadoes, and the alerts for watches, warnings and emergencies.

Weather forecasters warn about a major multiple-day outbreak of severe weather that includes multiple strong tornadoes from the Mississippi Valley to the Gulf Coast, Great Lakes and Atlantic coast through the weekend.