Tornadoes are among the most powerful and destructive natural hazards in the world, with the U.S. experiencing the most globally. Experts explain their formation, while residents of Joplin, Missouri (tornado in 2011) and Mayfield, Kentucky (tornado in 2021) share harrowing survival stories.

Wildfires are becoming megafires, devastating populated areas and causing tragic loss of life, as seen with the 2013 Yarnell Hill Fire near Yarnell, Arizona, the 2018 Camp Fire near Paradise, California, and the 2023 Maui Fire in Lahaina, Hawaii. Experts investigate the science and causes behind this phenomenon.

Two of the deadliest tsunamis ever recorded are the 2004 Indian Ocean Tsunami and the 2011 Tohoku Tsunami in Japan. Survivors recount traumatic experiences as scientists shed light on the causes and warning signs of tsunamis.