China initiated construction of the 60-gigawatt Medog Hydropower Station on Tibet's Yarlung Tsangpo in July 2025, intensifying downstream water security risks across South Asia. The massive dam gives Beijing structural leverage over transboundary flows supporting more than one billion people across the Ganges-Brahmaputra-Meghna and Indus basins. Climate volatility worsens these upper-riparian friction points, as highlighted by a September 2026 World Meteorological Organization report marking 2025 among the driest river years in decades.
Tensions are compounding downstream. India suspended the 1960 Indus Waters Treaty following the 2025 Pahalgam attack, though a Court of Arbitration deemed the decision impermissible. Concurrently, New Delhi faces domestic opposition from Bihar as the 1996 Ganges Water Sharing Treaty with Bangladesh approaches its December 2026 expiration. Meanwhile, upstream states like Nepal and Bhutan balance Indian hydro-exports against Chinese offers, while Afghanistan and Pakistan lack formal accords for the shared Kabul-Kunar basin.