Hear powerful survivor stories from the 2004 Boxing Day tsunami. It’s been 20 years since one of history’s deadliest natural disasters. Discover how tragedy defined a generation.

"The wave came in and just took her, it just took her away." On Boxing Day 2004, a 9.1 magnitude earthquake triggered a tsunami that raced towards shorelines around the Indian Ocean. Twenty years ...

A ‘tsunami’ wave moving faster than the speed a man could run brought devastation to the Gwent Levels hundreds of years ago.

Regular tsunamis are destructive, but mega tsunamis are on another level. Could one really reach skyscraper heights? How are they formed, and what would happen if the biggest one ever hit?