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 Kentucky and Missouri share harrowing survival stories.

Wildfires are becoming megafires, devastating populated areas and causing tragic loss of life, as seen with the Yarnell Hill Fire and the 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.

Volcanoes erupt globally every day, with immense destructive potential. Astonishing footage and survival tales provide insight into their monstrous power, from Mount St. Helens in 1980 to the 2018 eruption of Volcan de Fuego.

Hurricane season, from June to November, grips millions with anticipation and fear. The nation's top experts explore their formation, increasing frequency, heightened power, and the science behind surviving these killer storms.