Recent tsunamis in various parts of the world show how important global preparedness for natural disasters is. In recent years, tsunami events have resulted in severe damage to infrastructure, loss of life, and long-lasting environmental impacts. One of the most significant tsunamis occurred in the Sunda Strait in December 2018, which was triggered by the volcanic activity of Mount Anak Krakatau. This tsunami killed more than 400 people and damaged thousands of houses. The direct impact can be seen in the form of economic losses reaching billions of dollars, as well as population displacement involving thousands of people. From an environmental perspective, tsunamis cause coastal erosion, water pollution, and damage to natural habitats such as coral reefs. Research shows that maritime ecosystems can be hit hard even years after the event. In addition, tsunamis carry various waste and contaminants from land to sea, threatening marine life and fisheries resources. The global response to this tsunami has involved a variety of mitigation and recovery efforts. Organizations such as the United Nations International Strategy for Disaster Reduction (UNISDR) prioritize education and training programs to increase public awareness about tsunami risks. This initiative includes the development of early warning systems in several tsunami-prone countries, allowing faster evacuations and reducing the number of fatalities. Modern technology also plays an important role in monitoring seismic activity and potential tsunamis. Sophisticated underwater sensors and buoys are now used to detect tsunami waves in real-time. The data obtained can be used to inform governments and communities about impending threats, freeing up valuable time for evacuation. International cooperation is also visible in disaster management efforts. Developing countries often receive assistance from developed countries in the form of money, resources, and experts. Training and field trips were held to prepare local teams for future tsunamis. In addition, investment in stronger and disaster-resistant infrastructure is the main focus in order to minimize the impact on society. Local communities have an important role in responding to tsunamis. Communities that are aware of risk are better prepared to face disasters. Programs to strengthen local capacity and develop evacuation plans are crucial aspects in building community resilience to natural disasters. Success in overcoming the impact of the tsunami depends on the integration of government policy, public participation and international cooperation. This creates a system that is more resilient and responsive to unexpected disasters. In an era of climate change and increasing seismic activity, movement toward a better system is urgent.