Video footage of funnel cloud destroying an Amazon warehouse

Dozens of tornados touched down in the Midwest over the weekend including this one close to Edwardsville, IL. An Amazon warehouse was destroyed after a funnel cloud ripped out the wall, the size of a football field. The walls were 11 inches thick and made of concrete and forty feet high. There was a tornado warning at the time. It is unknown when the workers were alerted and told to get to safety.