What was the worst tsunami ever in history?

The Catastrophic Tsunami of 2004

The most catastrophic and deadly tsunami in recorded history occurred in the Indian Ocean on Boxing Day, December 26, 2004. This devastating event resulted in the highest number of casualties ever seen from a tsunami, with the death toll soaring to over 230,000 individuals. It impacted 14 nations, with Indonesia suffering the most severe devastation, followed closely by Sri Lanka, India, and Thailand.