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.

Volcanoes erupt globally every day, with immense destructive potential. Detailed footage and survival tales provide insight into their monstrous power, from Mount St. Helens in 1980 and Nevado del Ruiz in 1985 to the 2018 eruptions of Volcan de Fuego and Kīlauea.