Deadliest Tornadoes (S39E17)

In April 2011, a catastrophic tornado outbreak struck the U.S., resulting in over 360 fatalities and widespread devastation. What triggered such a severe event? How do these tornadoes develop? Despite advanced warning systems, why were there so many casualties? Are our weather patterns becoming increasingly severe—and what could that mean for the future? In this NOVA special, we follow scientists dedicated to unraveling the complexities behind this disaster. Their research aims to enhance tornado forecasting. Additionally, we hear from individuals whose lives have been dramatically altered by these extreme weather phenomena and explore how we can safeguard ourselves and our communities moving forward.