Tuesday will mark a somber anniversary, as it will be 100 years since the deadliest tornado in the country’s history ripped through Missouri, Illinois and Indiana.

A violent tornado outbreak has swept through the South and Midwest, leaving at least 29 people dead and causing widespread damage. The storm system, which has battered states such as Mississippi, Missouri,

Millions of Americans across the country are on alert for a severe weather outbreak as violent, long-track tornadoes with damaging winds of up to 80 mph and large hail are expected across the Midwest and South with the cross-country storm moveing east.