Vol. 7, Issue 2, Part H (2025)

South Asia, which holds almost a quarter of the world's population, is experiencing some of the worst effects of climate change, making it a key area where people are forced to leave their homes because of environmental changes. This study looks at the environmental, social, and political factors behind climate-related migration in countries like India, Pakistan, Bangladesh, Nepal, and Afghanistan. The research uses a qualitative method, analyzing information from official reports, policy papers, and real-life examples to understand the main reasons people are moving, such as rising sea levels, melting glaciers, floods, droughts, and storms. The results show that climate change hits the most vulnerable communities the hardest, making existing social issues worse and pushing millions to move, often without proper legal support or government help. The paper also points out that regional organizations like SAARC and BIMSTEC are not working well because of political disagreements and weak climate policies. It also criticizes the lack of global action, using the realist view of John Mearsheimer to show how political power gets in the way of effective responses. The study suggests that solving the issue of climate-related displacement in South Asia needs better cooperation between countries, policies that include everyone, and a focus on climate justice in both national and international rules about migration. Important steps like building stronger infrastructure, setting up early warning systems, and supporting local adaptation efforts are needed to reduce future displacement and provide long-term security for people in the region.