Tsunamis are natural phenomena that can destroy life in an instant. History records various tsunami disasters that rocked the world, having a profound impact on nations and ecosystems. One of the most famous tsunamis was the Indian Ocean Tsunami on December 26, 2004. Completed by an earthquake measuring 9.1 on the Richter scale, this tragedy killed more than 230,000 people in 14 countries, including Indonesia, Thailand and Sri Lanka. Economic losses are estimated at 15 billion US dollars, leaving a deep trail of sorrow. Apart from that, the Japanese Tsunami on March 11 2011 also changed the face of the world. A magnitude 9.0 earthquake off the coast of Tōhoku produced waves as high as 40 meters, which hit places like Fukushima. As a result of this disaster, hundreds of thousands of people were left homeless, and the Fukushima Daiichi incident became one of the most serious nuclear crises in history. The tsunami on Krakatau Island, which occurred in 1883, was also a thrilling event. Krakatoa’s volcanic explosion caused waves as high as 36 meters, resulting in the deaths of more than 36,000 people. The sound of the explosion was heard thousands of kilometers away, and its impact was felt around the world with extreme climate change. The impact of the tsunami was not only physical, but also social and psychological. Survivors often experience deep trauma, and many require psychological support years after a disaster. Destroyed infrastructure, job losses and mass displacement are problems that require serious attention from governments and non-governmental organizations. In facing the tsunami threat, developing an early warning system is very important. Countries in vulnerable areas such as Indonesia and Japan have built better infrastructure and increased public awareness of the early signs of a tsunami. For example, very high waves followed by the withdrawal of water into the sea can be an early indicator of an impending tsunami. Scientific research on tsunami patterns and behavior is also continuing. Using modern monitoring technology, scientists are trying to estimate the arrival time and strength of the waves, so that people can prepare and evacuate early. This is a priority to prevent loss of life and property in future incidents. Overall, tsunamis are a real threat that must be watched out for. Various historical events teach us the importance of resilience and preparation. International collaboration in research, technology and education is needed to face this disaster. Tsunamis are not just a story of the past, but an ongoing challenge for global society, forcing us to adapt and rebuild, in harmony with the nature that surrounds us.