In India, between 2017 and 2021, thermal power plants lost 8.2 TWh of production due to insufficient water for cooling. Water shortages severely disrupt multiple economic and social activities. According to the Global Commission on Adaptation, cited by the WRI, the GDPs of India, China, and Central Asia could be 7 to 12% lower in 2050 without better water management. According to the World Resources Institute, an additional billion people could live under extremely high water stress by 2050.
The Essential Points
- Without adaptation, the Global Commission on Adaptation projects that India, China, and Central Asia will lose between 7 and 12% of their annual GDP by 2050 due to water scarcity.
- Water directly determines electricity: Indian power plants produced 8.2 TWh less between 2017 and 2021 due to insufficient cooling water.
- According to the World Resources Institute, an additional billion people could live under extremely high water stress by 2050.
- Water scarcity strikes agriculture, energy, and political stability simultaneously, requiring strengthened cross-sector and territorial coordination.
- Transboundary watersheds in Central Asia and the Indian subcontinent pose a governance question that markets alone cannot resolve.
Water Cuts Electricity Before Creating Thirst
The water dependency of the electricity system creates an asymmetric vulnerability: the same drought period strikes production and demand in opposite directions simultaneously. This mechanism makes peaks in grid tension difficult to anticipate with standard planning tools, which model water availability and electricity demand as independent variables, when they are actually coupled by temperature and the hydrological cycle.
Most debates about water focus on taps and crops. Indian electricity data shifts the focus.
Thermal power plants, whether burning coal, gas, or nuclear fuel, need water to cool their turbines. When rivers are too low or too warm, plants reduce production or shut down. In India, this phenomenon cost 8.2 TWh between 2017 and 2021—equivalent to the annual consumption of several million households. Extreme heat, which pushes electricity demand upward and river levels downward, creates a double constraint: more need, less capacity.
This mechanism repeats in Europe, China, and the United States. During the 2022 heat waves, French power plants had to reduce production because the Loire and Rhône were too warm to absorb their thermal discharge without damaging ecosystems. The difference is that France has an interconnected electrical grid and institutional adaptive capacity that most Indian states do not. For South Asia, a water shortage in June, at the peak of summer demand, can mean massive blackouts in already strained regions.
Water and energy form an inseparable pair, and the transition to renewables does not resolve everything: solar and wind consume less water than thermal plants, but hydroelectric dams, which still supply a significant share of Asian electricity, depend directly on river flows. Less glacial melt, less predictable monsoons, less regularity in production.
Agriculture Absorbs 70% of Consumed Water and Bears Most of the Risk
Electricity is the most legible signal because it is measurable in real time. Agriculture is the sector under the heaviest pressure.
In Asia-Pacific, agriculture accounts for approximately 70% of freshwater withdrawals, with irrigation being its primary driver. In the Ganges plains, groundwater stocks are declining at rates of a few centimeters per year according to estimates combining satellite data and ground measurements, sustained for decades by subsidized pumps that enabled the green revolution but accumulated considerable water debt. Pakistan, Bangladesh, and northwestern India share this same aquifer, and no bilateral agreement currently regulates the pace of withdrawals.
The projected loss in agricultural GDP by the WRI is not abstract. It combines several mechanisms: declining yields when crops lack water at critical moments, rising irrigation costs as aquifers drop, and increased risks of food failures that fuel inflation and poverty. In economies where 30 to 40% of the active population still work in agriculture, a contraction in water productivity directly translates into rural income loss, accelerated urban migration, and weakened national food systems.
The Middle East illustrates the extreme case. Some Gulf states have largely abandoned rain-fed agriculture and finance themselves through desalinated water, which shifts the constraint toward energy and production costs. Saudi Arabia cultivated wheat for decades by pumping a non-renewable fossil aquifer; it halted the program when water became too scarce and expensive. Yemen, without resources for desalination or significant oil revenues, faces a water crisis that directly worsens armed conflict.
The Geopolitics of Water Drawing New Fractures
Rivers do not follow borders. This is a geographical fact that becomes explosive when flows decline.
In Central Asia, five countries born from the USSR share the waters of the Syr Darya and Amu Darya, which once fed the Aral Sea. Moscow managed trade-offs between upstream water-producing countries (Kyrgyzstan, Tajikistan) and downstream consuming countries (Uzbekistan, Kazakhstan, Turkmenistan). After 1991, the ICWC was established in 1992 as a regional water coordination mechanism for Central Asia. Tensions over Tajik and Kyrgyz dams, operated to increase winter releases for electricity production, reduce volumes available in summer when downstream countries need water for irrigation, particularly cotton, and remain a chronic source of diplomatic friction.
In South Asia, Indus waters are subject to a treaty signed in 1960 between India and Pakistan under World Bank mediation. This treaty survived three wars. But it was designed for a different hydrological regime, before Himalayan glacier melt altered the seasonality of flows. In 2023, India contested and refused to participate in the parallel procedure of the Permanent Court of Arbitration, while indicating it would continue discussions with Pakistan on modifying the treaty—illustrating how quickly water resources can become a political instrument.
China occupies a particular position: it controls the sources of many major Southeast Asian rivers, including the Mekong, on which it has built a series of dams that alter hydrological cycles downstream in Vietnam, Cambodia, and Thailand. The Mekong Commission, which brings together riparian countries, has dialogue tools but no enforcement mechanism. As droughts intensify, tensions between Chinese upstream management and downstream agricultural needs could escalate.
Two Trajectories for the Next Thirty Years
The Global Commission on Adaptation, cited by the WRI, projects GDPs 7 to 12% lower in 2050 without better water management. Without more efficient allocation and use of water, the GDPs of India, China, and Central Asia could be 7 to 12% lower in 2050. The other trajectory exists.
It rests on a set of technical and institutional choices, several of which are already implemented at significant scales. Singapore today recycles approximately 40% of its wastewater into drinking water through the NEWater program, launched in the 2000s after a drought threatened its supplies from Malaysia. Israel irrigates 75% of its agriculture with recycled or desalinated water and has developed drip irrigation techniques adopted in dozens of countries. These two cases show that water constraints can become a driver of innovation rather than a ceiling.
In India, the Jal Jeevan Mission program aims to connect all rural households to running water by 2024, a goal partially achieved with over 70% of connections according to the Indian government. This program does not solve aquifer overexploitation, but it reduces losses in canals and improves distribution efficiency. India is also experimenting with artificial aquifer recharge in several states, storing monsoon rainwater for use during the dry season.
The difference between the two trajectories—the 12% loss and successful adaptation—lies less in available technology than in the speed and scale of deployment. Solutions exist. Their diffusion depends on public funding, regulations on water use, and cross-border cooperation that have not yet found their institutional framework.
Unresolved Limits of International Governance
The Global Commission on Adaptation has documented that each dollar invested in water management and adaptation infrastructure generates on average multiple dollars in avoided economic benefits. These multipliers are debated in their precision, but the order of magnitude is consistent with other evaluations of hydraulic infrastructure. The problem is that benefits are diffuse and take a long time to materialize, when the political costs of water regulation are immediate.
Regulating irrigation means challenging rights acquired by powerful agricultural lobbies. Building cross-border agreements means accepting a constraint on a resource that states traditionally treat as part of their sovereignty. Pricing water at its true cost means creating losers, often among the poorest farmers if redistribution mechanisms do not keep pace.
These blockages are not specific to water. They resemble obstacles encountered by other structural transitions, whether carbon taxation or trade rules. The difference is the urgency of the timeline: in some overexploited aquifers, withdrawals exceed recharge, and the Hindu Kush-Himalaya glaciers that support ten major Asian river systems are losing mass overall in the long term, with acceleration since 2000.
The governance architecture best suited to this type of problem generally combines three elements: clearly defined and enforceable water rights, a price that reflects scarcity without excluding the poorest users, and transboundary sharing mechanisms with incentives for cooperation rather than pure constraints. Few Asian basins currently meet all three conditions. Some have one or two. The question for the next decade is whether states in the region will find the institutional arrangements necessary before economic losses create political pressures that are harder to manage.
Signals exist. The Asean Water Coalition is making slow progress on regional standards. Dialogue among Mekong riparian countries has intensified since 2020. The water framework agreement of the Shanghai Cooperation Organization covers part of Central Asia. These frameworks are insufficient given the scale of the challenge, but they show that water cooperation is politically possible when states perceive the risk as sufficiently immediate.
The trajectory of 7 to 12% GDP loss corresponds to a scenario of non-decision, not fate. Asian governments will have to determine how quickly their institutions can scale up.
Sources
- World Resources Institute – Water Stress Rankings 2026
- UN World Water Development Report 2025, UNESCO/UN-Water
- Global Commission on Adaptation – Adapt Now: A Global Call for Leadership on Climate Resilience
- India electricity data 2017-2021, Central Electricity Authority (India)
