I wholeheartedly recommend watching the National Geographic documentary: Tsunami: Race Against Time. It’s on Disney or try this link: https://www.nationalgeographic.com/tv/show/caafb96b-b9bf-4995-b8b5-b5e7ab7043fd
The number of lives lost and the amount of destruction is horrifying, but ultimately, the stories of the survivors and the courage of everyday people makes it very uplifting.