John Sergeant, chief of emergency medical services at the Naperville Fire Department, was 12 years old when he first saw what a tornado could do. At the time, Sergeant had gone to help family members in the aftermath of the devastating tornado that killed 29 people and injured 350 others in Plainfield in 1990.
Click here for original story, Tornadoes touching down in new areas. Season is starting sooner and lasting longer, experts say
Source: Phys.org