Climate crisis could displace 40 million South Asians by 2050

South Asia faces an unprecedented climate-driven displacement crisis, with up to 40.5 million people potentially forced to leave their homes by 2050 under the most severe projected scenarios, according to a United Nations analysis. The region's vulnerability stems from its dense population centres, reliance on climate-sensitive agriculture, and exposure to extreme weather events including flooding, drought, and cyclones.

The projected displacement would represent one of the largest migration crises in modern history, with ramifications extending far beyond South Asia's borders. Rising sea levels threaten coastal populations across Bangladesh, India, and Sri Lanka, while shifting monsoon patterns and water scarcity could render vast agricultural areas uninhabitable, displacing rural communities dependent on farming.

The UN assessment underscores the interconnected nature of climate impacts in the region. Infrastructure degradation, economic collapse in affected sectors, and resource scarcity are likely to compound the direct effects of environmental change, creating cascading pressures that force migration. Urban centres, already grappling with rapid growth and strained resources, may face additional strain from climate refugees.

The findings highlight the urgency for regional governments to pursue ambitious climate mitigation and adaptation strategies. Experts emphasise that comprehensive approaches—including climate-resilient infrastructure, sustainable water management, and livelihood diversification—are essential to mitigate the scale of potential displacement and protect vulnerable populations across South Asia.