A tsunami is a large ocean wave usually caused by an underwater earthquake, volcanic eruption, or landslide. This phenomenon has extraordinary destructive power and can cause serious damage to coastal areas. The impact of the tsunami includes loss of life, damage to infrastructure, and long-term environmental impacts. The most striking impact of the tsunami was the loss of life. Many fatalities result from being trapped by large waves, which often hit without warning. In addition, infrastructure such as roads, bridges and buildings can be seriously damaged, hampering evacuation and rescue processes. In an economic context, a tsunami can destroy people’s main source of income, especially in areas that depend on tourism and fishing. The damage caused can take years to recover. Public spaces such as harbors and residences are also affected, creating a housing crisis. The environmental impacts of tsunamis include water pollution and habitat destruction. Hazardous waste from damaged buildings can contaminate clean water sources, affecting public health. In addition, marine life and coastal ecosystems can be disrupted due to damage. Tsunami mitigation is very important to reduce risks. The establishment of early warning systems, which use sensors to detect earthquakes and waves, has proven effective in saving lives. Public education about evacuation steps and safe routes is also very crucial. Regular training and simulations can increase community preparedness. Spatial planning also plays an important role in mitigation. Avoiding development in tsunami-prone zones and creating green areas as buffers can reduce the impact of waves. Apart from that, engineering tsunami-resistant building construction can be an effective step in maintaining infrastructure. Collaboration between government agencies, non-government organizations and local communities is very important in mitigation efforts. Together, they can create a comprehensive emergency response plan and ensure adequate resources for post-tsunami recovery. Finally, continued research in geology and monitoring technology is essential. A better understanding of the causes and patterns of tsunamis allows the development of more innovative solutions. Through effective mitigation measures and careful planning, the impact of tsunamis can be minimized, providing more protection for coastal communities.