Modi Blocks Water to Pakistan After Kashmir Terror Strikes

# India–Pakistan Water Dispute: How Water Became the Most Dangerous Flashpoint in South Asia

There is something deeply unsettling about the idea of two nuclear-armed nations fighting over water. Yet that is precisely where South Asia finds itself today. What was once managed through careful diplomacy and international agreements has slowly transformed into one of the region's most volatile pressure points — and recent events have pushed it to an entirely new level of urgency.

The Indus Waters Treaty (IWT), signed in 1960, was supposed to be the answer. It was designed to prevent exactly this kind of standoff. For over six decades, it held — surviving wars, terrorist attacks, missile crises, and the kind of bilateral hostility that would have torn apart most international agreements. But in April 2025, something broke.

## The Pahalgam Attack and the Day the Treaty Stopped

On 23 April 2025, India did something no one had done in 65 years. Following the Pahalgam terror attack in Indian-administered Kashmir, which killed 26 tourists, the Indian government officially placed the Indus Waters Treaty "in abeyance with immediate effect." The stated reason was Pakistan's alleged support for cross-border terrorism. Pakistan denied involvement in the attack and accused India of "weaponizing water."

This was not a political speech or a campaign promise. This was a formal letter from the Government of India to the Government of Pakistan. In one move, India suspended one of the most conflict-resilient water-sharing agreements in modern international history.

The world took notice — not just because of the diplomatic fallout, but because of what it meant for millions of ordinary people who depend on these rivers for everything: drinking water, crops, livelihoods, and survival.

## What the Treaty Actually Said

To understand why this matters so much, you have to go back to the beginning.

The Indus Waters Treaty was signed in September 1960 after nearly a decade of negotiations mediated by the World Bank. The context was the chaotic aftermath of the 1947 partition of British India, which had split river systems between two hostile new nations with no agreed framework for sharing them.

The solution was a clean division. India received rights over the three eastern rivers — the Ravi, Beas, and Sutlej. Pakistan received rights over the three larger western rivers — the Indus, Jhelum, and Chenab. In practical terms, this meant Pakistan received access to roughly 80% of the total water allocation from the Indus Basin, which spans approximately 1.12 million square kilometres across India, Pakistan, China, and Afghanistan.

India retained the right to build run-of-the-river hydroelectric projects on western rivers, along with limited domestic and agricultural use — but no large storage dams that could significantly reduce the downstream flow into Pakistan.

For Pakistan, this was the lifeline. For India, it was a legal constraint. And for decades, both sides lived with it.

## Pakistan's Existential Dependence on the Indus

Let's start with one number that tells you almost everything: 90% of Pakistan's entire agricultural output depends on water flowing from the Indus Basin. Not half. Not most. Nine out of ten crops, nine out of ten farmers, nine out of ten harvests — all tied to the same river system now sitting at the centre of a geopolitical standoff.— it is a structural reality that shapes the country's entire existence.

Agriculture contributes around  22–23% of Pakistan's GDP and employs over 37% of its workforce. These are not abstract statistics. They represent farmers in Punjab, fishermen along the Sindh coast, families in rural areas whose entire income depends on seasonal water flows. When you understand this, you begin to understand why any discussion of water access immediately becomes a matter of national security in Pakistan.

The numbers are getting worse, not better. Pakistan's per capita water availability has collapsed from over 5,000 cubic metres per person per year in 1951 to less than 900 cubic metres today— well below the internationally recognised water scarcity threshold of 1,000 cubic metres. The country crossed the "water stress line" in 1990 and the "water scarcity line" in 2005. Pakistan's water pressure — measured as the proportion of water withdrawn against total renewable supply — stands at a staggering 74%, compared to India at 40%, Iran at 67%, and China at 19.5%.

The winter of 2024–2025 made things dramatically worse. Pakistan experienced 67% less rainfall than usual, making it one of the driest seasons in recorded history. The province of Sindh, one of the country's most agriculturally critical regions, saw a 90% reduction in rainfall. Punjab, the agricultural heartland, recorded a 69% reduction. In June 2025, Pakistan's usable water reserves didn't just dip — they collapsed. In the span of four days, the country lost 723,000 acre-feet of water. To put that in perspective, that's not a seasonal dip or a manageable shortfall. That's an entire nation's water security draining away faster than anyone could respond.

These are catastrophic numbers. And they arrived at the worst possible moment — just as the treaty that protected Pakistan's primary water supply was being suspended.

## India's Side of the Argument

India's position is not without logic, even if critics argue it crosses legal and humanitarian lines.

For years, India argued that it had not fully utilised the rights it was entitled to under the treaty. It began developing hydroelectric infrastructure on western rivers that fell within permitted limits — the Baglihar Dam on the Chenab, the Kishanganga Hydroelectric Project on the Jhelum tributary, and the Ratle project, also on the Chenab. Pakistan objected to the designs of both the Kishanganga and Ratle projects, fearing they could reduce downstream flows and violate treaty terms.

The dispute escalated through formal channels. In 2022, the World Bank — the same institution that helped birth the treaty back in 1960 — stepped back in, this time appointing two separate bodies to untangle the mess: a neutral expert, which India had asked for, and a Court of Arbitration, which Pakistan had demanded.  India objectedto the arbitration process, arguing it was illegally constituted, and refused to participate. In 2023, India formally requested a bilateral modification of the treaty, citing demographic changes and environmental challenges — Pakistan refused.

By 2024, India had called off all meetings of the Permanent Indus Commission, the bilateral body that was supposed to manage ongoing disputes. Then came April 2025 and the full suspension.

India's broader argument — that the treaty is outdated, that climate change has altered water availability,and that a 1960 agreement cannot govern a 21st-century reality — is not entirely without merit. But critics note that a unilateral suspension of an international treaty sets a precedent that no functioning international order can comfortably accommodate.

## The Climate Crisis: A Crisis Within a Crisis

Even setting aside the political tensions, the Indus Basin faces a slow-motion ecological emergency that neither country can escape.

The Himalayas are warming faster than almost anywhere else on Earth. Glacial melt currently contributes between 50% and 80% of the average water flow in the Indus River basin — which means the rivers are currently running partly on borrowed time. As glaciers shrink, peak flows will shift earlier in the year and become increasingly unpredictable, making agricultural planning enormously difficult.

Pakistan's water storage infrastructure is dangerously inadequate for this reality. The country's water storage capacity is limited to a maximum 30-day supply— far below the 1,000-day capacity that international standards recommend for countries facing its level of climatic risk. Meanwhile, around 60% of irrigation water is lost through open channels, poor canal maintenance, and unregulated groundwater extraction. The irrigation system, despite being one of the largest in the world by area, was built for a different climate and a smaller population.

The 2025 floods offer a grim illustration of the paradox Pakistan faces. Even as the country struggles with drought conditions in some regions, extreme rainfall events have overwhelmed its fragile drainage systems. At least 242 people died in the 2025 flood wave — rainfall that simultaneously could not be stored for future dry periods because the infrastructure simply does not exist.

India faces its own version of this pressure. Rapid urbanisation, industrial demand, and a changing monsoon pattern are straining domestic water availability. The political incentive to maximize water infrastructure development — even on rivers shared with Pakistan — reflects real internal pressure, not just diplomatic posturing.

## A Treaty Under Legal and Diplomatic Siege

The legal situation following India's suspension is genuinely unprecedented and deeply complicated.

The Court of Arbitration at The Hague has continued its proceedings. In August 2025, it issued an award on issues of general interpretation of the IWT — a ruling India has rejected, consistent with its position that the court has no legitimate authority. Pakistan, meanwhile, has filed written submissions and taken the matter to the UN Security Council, where it holds a non-permanent seat for the 2025–2026 term.

India insists on bilateralism — pointing to the 1972 Simla Agreement, which requires the two countries to settle differences through bilateral negotiations rather than international forums. Pakistan has threatened to suspend the Simla Agreement itself, though it remains operational.

The result is a legal standoff with no clear resolution path. International treaties cannot simply be torn up by one party — but enforcing them against a sovereign state that refuses to cooperate is equally difficult. Water keeps flowing. The rivers do not respect diplomatic impasses.

## The History That Makes This So Dangerous

What makes the current situation especially worrying is the long history it echoes. The Indus Waters Treaty survived:

- The 1965 India–Pakistan War
- The 1971 war that led to the creation of Bangladesh
- The 1999 Kargil conflict
- The Uri attack aftermath in 2016
- The Pulwama attack aftermath in 2019

Every one of those moments triggered political rhetoric about water. None of them resulted in a formal suspension of the treaty — until now. The fact that 2025 crossed a line that six decades of conflict could not cross tells you something important about where the two countries actually are in their relationship.

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## What Suspension Really Means in Practice

It is worth being precise about what India's suspension actually changes on the ground — because the answer is complicated.

India cannot simply "turn off" Pakistan's water supply. The western rivers flow from Himalayan glaciers and rainfall systems that no dam network can completely control. As one expert quoted in international coverage put it bluntly: completely cutting off Pakistan's water supply would be "an impossible task" given existing infrastructure.

What India can do — and what the suspension legally enables, under India's interpretation — is accelerate infrastructure development on western rivers without following treaty notification and consultation requirements. It can push ahead with the Ratle and Kishanganga projects more aggressively. It can begin planning new storage projects that would previously have required bilateral consultation. Over years and decades, this could meaningfully reduce downstream flows into Pakistan, particularly during dry seasons.

For Pakistan, this is not a hypothetical threat. It is a slow-moving catastrophe playing out against an already fragile water security backdrop.

## What the Numbers Tell Us About the Stakes

Some figures are worth pausing on:

- Pakistan's water pressure ratio is  74% — among the highest in the world
- Over 80% of Pakistan's irrigation water comes from the western rivers guaranteed under the IWT
- Pakistan has a maximum 30-day water storage capacity against a recommended 1,000 days
- 60% of freshwater is lost to inefficient irrigation infrastructure
- The Indus Basin's river inflow has already declined by an estimated 30% since 1990
- Pakistan's per capita water availability has fallen by over 80% since independence

These numbers exist in a country of over 240 million people, with a population projected to grow significantly further. They represent a genuine civilisational challenge — one that political and military standoffs only make worse.

## The Road Ahead: Difficult and Uncertain

There is no easy resolution visible on the horizon.

India has indicated it is open to talks — but only on its own terms, bilaterally, and only after Pakistan takes credible action on terrorism. Pakistan insists the treaty must be restored without preconditions and has internationalised the dispute through The Hague and the UN Security Council. The Court of Arbitration continues issuing rulings that India refuses to recognise.

What is clear is that water cannot be separated from security in South Asia any longer. It never really could be — but for decades, both countries agreed to pretend otherwise, and that agreement kept the rivers flowing and the diplomatic channels open.

The deeper lesson may be that a 1960 treaty — designed for a different world, a different climate, and a different bilateral relationship — was always going to face this reckoning eventually. The question is whether the two countries can find a way to modernise the framework without weaponising the process, and without letting millions of ordinary people — farmers in Punjab, families in Sindh, communities along the Indus — pay the price for decisions made in capitals and courtrooms far from the rivers themselves.

Water, in the end, is not a political instrument. It is life. And right now, that life is caught between two nations that have never been further apart.

This article draws on sources including Britannica, NPR, Climate-Diplomacy, The Borgen Project, DAWN, ISAS, and The Agricultural Economist. Data reflects figures available as of mid-2025.