The Tri-State Tornado barreled across more than 200 miles, decimating entire towns in and leaving thousands homeless on March 18, 1925.

Damage assessments and recovery operations continue after a powerful storm system over the weekend spawned a deadly severe weather outbreak, dust storms, and wildfires.

Even 100 years later, the Tri-State tornado is widely considered America's worst tornado. It killed almost 700 in an era without warnings or radar.