The impact of global tsunamis on society is very diverse, considering that this natural disaster can destroy infrastructure and change people’s lives in an instant. Tsunamis caused by earthquakes, volcanic eruptions or landslides are capable of claiming lives and triggering social upheaval. One of the most direct impacts is loss of life. Statistics show that thousands of people can die in a short time, leaving families and communities in mourning. This tragedy created deep trauma, affecting the mental health of the survivors. Psychological therapy is important in helping individuals deal with loss and trauma. In addition, when a tsunami hits, public infrastructure such as houses, schools and health facilities are often destroyed. Rebuilding this infrastructure not only takes time, but also requires large costs. This could slow economic recovery and worsen poverty, especially in already vulnerable areas. Local economies may experience a sharp decline as key livelihoods such as fishing and tourism are damaged. The social impact is also quite significant. Damaged communities can face disintegration, where families are separated and community solidarity weakens. Forced migration occurs as people seek safer places, creating new challenges for already densely populated areas. On the other hand, tsunamis can increase awareness of disaster mitigation. Communities and governments are starting to invest in disaster-resistant infrastructure and early warning systems. Education about disaster preparedness is a priority, teaching communities how to cope and respond when similar threats emerge in the future. The environment also changed due to the tsunami. Agricultural land can be polluted by sea water, changing the way agriculture is done in the region. The lack of coastal vegetation due to tsunami waves is dangerous for the ecosystem and reduces natural protection from similar disasters in the future. International institutions and humanitarian aid also play an important role in post-tsunami community recovery. Allocations of funds and resources for recovery often come from outside the country, creating new relationships or strengthening international diplomacy. While aid figures are often eye-watering, uneven receipt and distribution can be a source of tension. The tsunami also affected cultural aspects. Certain traditions and rituals may be lost due to the loss of historical places. Communities struggle to remember and celebrate their cultural heritage while adapting to new conditions. The community’s response to the tsunami created important lessons in sustainability and revival. It is hoped that by understanding the broad impact of tsunamis, we can build communities that are more resilient and ready to face future natural disasters, focusing on awareness, education and collaboration.