Seti in 2012. Melamchi in 2021. Thame in 2024. Rasuwa and the Bhotekoshi corridor in 2026. Different places, different triggers, different forms of destruction. Yet together they leave us with an uncomfortable question: how many more warnings do we need before we accept that Nepal’s mountains are entering a new era of risk? The devastation caused by the recent Rasuwa disaster is difficult to comprehend. Water, ice, rock and debris surged through a mountain corridor, destroying homes, infrastructure, livelihoods and lives. 

The August 26 event was not simply a conventional flood. Preliminary scientific analysis points to a complex chain of mountain processes, while the precise contribution of climate change to this particular event continues to be examined. But one reality is already clear: the Himalayan risk landscape is changing. The question is no longer simply whether another flood, landslide or avalanche will occur. It is whether our institutions are prepared for the disasters that may come next.

We tend to classify disasters separately: flood, landslide, avalanche, glacial lake outburst flood. The mountains do not. A slope can collapse into a river, a river can be blocked, water can accumulate behind a temporary natural dam, and its sudden release can produce a destructive surge downstream.

This is the emerging reality of cascading mountain hazards, and the Rasuwa disaster has exposed how quickly a disturbance high in the mountains can become a crisis far downstream. It also exposes the limits of conventional early-warning systems.

A warning is useful only when the relevant hazard can be detected and people have enough time to act. Monitoring rainfall and river levels remains essential, but sudden high-altitude collapses can occur outside conventional monitoring parameters.

Nepal therefore needs to move from early warning to anticipatory action. We need to monitor not only rivers, but glaciers, unstable slopes, rainfall, soil conditions and other indicators of mountain instability. Satellite observation, remote sensing, ground sensors, geographic information systems and emerging forecasting technologies can strengthen this capacity.

But technology is not the destination. Saving lives is. A warning must be connected to a predetermined action: evacuation, road closure, suspension of vulnerable infrastructure, emergency mobilization or movement to safer areas. The measure of a sophisticated warning system should not be the number of sensors installed; it should be the number of lives protected.

When the rescue operation ends, another challenge begins: reconstruction. Roads must be repaired, bridges rebuilt, homes restored, businesses revived and infrastructure brought back into operation. But, reconstruction should not mean simply putting back what was there before.

If a settlement is in a high-risk location, should it be rebuilt in exactly the same place? If a road repeatedly destabilizes a slope, should we reconstruct the same alignment? If infrastructure was designed using historical rainfall and flood assumptions, are those assumptions still sufficient? These questions may be difficult, but they cannot be avoided.

The principle should be simple: build back better, not back as before. A destroyed road should not automatically return to the same alignment; a high-risk settlement should not automatically return to the same site; and infrastructure designed for yesterday’s climate should not simply be reconstructed using yesterday’s assumptions.

Nepal needs climate- and hazard-informed infrastructure planning, particularly in fragile mountain corridors. Geological conditions, slope stability, drainage, erosion, land use and future climate risks must become central to infrastructure decisions. Nepal needs development. Roads, electricity, communications, tourism and industry are essential to our future. But there is a difference between development and risk-blind construction.

A road through a mountain is in development. A road through an unstable mountain without understanding its geology, drainage and future risk may simply be tomorrow’s disaster waiting to happen. There is another dimension we cannot ignore: climate justice. Nepal contributes only a tiny share of global greenhouse-gas emissions, yet its people face disproportionate exposure to climate and mountain hazards. Those who have contributed least to global warming are increasingly among those paying the highest price.

This is not simply a question of vulnerability. It is a question of rights. The Constitution recognises the fundamental right to a clean and healthy environment. At the international level, the right to a clean, healthy and sustainable environment has also been recognised as essential to human dignity and wellbeing. Climate change threatens that right in very tangible ways: through the loss of homes, livelihoods, food security, water, health, education and safe living environments.

For people living in vulnerable Himalayan valleys, climate change is therefore not an abstract debate about emissions. For a child whose school is washed away, a mother who loses her home and livelihood, an older person unable to evacuate quickly, or a family whose only road to the outside world disappears, it is a question of safety, dignity and survival.

Climate justice is therefore not simply about who emits and who suffers. It is also about who has rights and who carries responsibilities. The principle of common but differentiated responsibilities and respective capabilities recognises that climate action must reflect differences in historical contribution, capacity and circumstances.

For Himalayan communities, the right to a clean, healthy and sustainable environment must also mean access to information, meaningful participation in decisions affecting their environment, and effective protection when environmental harm threatens their lives and livelihoods. Vulnerable people should not be treated merely as beneficiaries of climate action. They are rights-holders.

This is why Nepal’s international climate demands should be framed not as appeals for sympathy or charity, but as matters of equity, responsibility and rights.

Climate finance must not deepen the debt burden of countries already suffering the consequences of a crisis they contributed little to creating. Where support is required for adaptation, resilience and loss and damage, vulnerable countries need accessible, adequate and predictable finance—with grants playing a far greater role than loans that simply transfer today’s climate losses into tomorrow’s debt.

The polluter-pays principle offers an important starting point. Those who have contributed most to environmental damage should carry a greater share of the cost of addressing it. This does not mean reducing climate diplomacy to blame. It means recognising historical responsibility while building a fairer system of shared action.

Justice must also extend to the communities that protect the ecosystems on which others depend. Nepal’s mountains, watersheds, forests and freshwater systems provide benefits far beyond national borders. Mechanisms such as payment for ecosystem services can help recognise the contribution of communities that protect these systems and ensure that they share in their value.

Climate justice must exist between countries, but it must also exist within countries.Climate justice also requires us to look in the mirror. Not every disaster is caused by climate change. Human decisions can turn natural hazards into catastrophes.

We cut slopes without adequate geological understanding. We block drainage channels. We encroach on river corridors. We expand settlements into exposed areas. We build infrastructure without sufficiently accounting for environmental sensitivity. Then, when extreme rainfall or mountain failure occurs, we call the consequences a “natural disaster.”

Nepal already has a legal and policy foundation for environmental protection, disaster risk reduction and climate resilience. The question is no longer whether we have policies; it is whether our policies are strong enough to change what happens on the ground.

Environmental assessments, climate-risk considerations and disaster-risk safeguards must influence decisions from the design of a road or hydropower project to the planning of a settlement—not remain exercises completed on paper.

The precautionary principle should guide development in an increasingly uncertain mountain environment. Scientific uncertainty about the precise chain of an individual disaster must not become a reason to postpone action when the potential consequences are catastrophic.

Nepal therefore needs a new development ethic—not anti-development, but risk-conscious development. The question should not be whether we can build. It should be whether we can build safely, sustainably and fairly.

The Rasuwa disaster also reminds us that Himalayan risk is inherently transboundary. Rivers cross borders. Weather systems cross borders. Glaciers and mountain ecosystems do not recognise political boundaries. A hazard that begins upstream can become a crisis downstream.

The Hindu Kush Himalaya is often described as the “Third Pole” and the “water tower of Asia.” Its mountains sustain major river systems and support hundreds of millions of people across the region.

Nepal therefore needs stronger scientific and operational cooperation with China and other Himalayan countries, including data sharing, satellite observation, glacier and slope monitoring, hydrological information, emergency communication and transboundary warning mechanisms.

As a riparian country, Nepal’s interests are not limited to receiving water downstream. Transboundary water governance is grounded in principles of equitable and reasonable utilisation, prevention of significant harm and cooperation. Shared rivers create not only shared benefits, but shared responsibilities.

Where information can save lives, it should move faster than the disaster. The Hindu Kush Himalaya is a shared ecological system. What happens in its mountains affects water, food, energy, biodiversity and livelihoods across Asia. Protecting the Himalaya is therefore not only a national responsibility. It is a regional and global one.

From vulnerability to leadership

In 2023, during his visit to Nepal, UN Secretary-General António Guterres stood in the Himalaya and called from the “rooftop of the world”: “Stop the madness.” Three years later, the warning feels painfully contemporary. The glaciers have not stopped changing. Mountain risks have not stopped growing. And communities living beneath these mountains cannot afford another decade of warnings without action.

Nepal should turn its vulnerability into diplomatic leadership.It can champion the global mountain agenda and become a leading voice for climate justice, resilient communities and fair climate finance. Situated between China and India and at the heart of the Himalaya, Nepal also has the potential to become a centre for Himalayan climate diplomacy—bringing governments, scientists, communities and development partners together to negotiate not only emissions, but fairness, finance, resilience and responsibility.

Nepal’s case should be framed not as a demand for charity, but through the language of responsibility, equity and shared interest. Our Ministry of Foreign Affairs should proactively tell the world why a country that has contributed negligibly to global emissions should not bear a disproportionate share of the consequences of a warming planet.

Nepal should also use every appropriate international platform to elevate the climate-security dimension of the Himalayan crisis, strengthen recognition of climate change as an environmental and human-security challenge, and press major historical emitters to accelerate emissions reductions while supporting vulnerable countries.This is not about turning Nepal’s vulnerability into a diplomatic grievance. It is about turning vulnerability into principled leadership.

The Rasuwa disaster should lead to more than relief and reconstruction. It should lead to a national rethink of mountain-risk governance. We need integrated Himalayan risk monitoring, cascading-hazard early-warning systems and anticipatory action at the local level. We need climate-risk screening of major infrastructure, risk-sensitive land-use planning and safer reconstruction. We need stronger transboundary cooperation and a much stronger international voice on climate finance, loss and damage and climate justice.

But perhaps the deepest question is about the kind of future we want. For Nepal, development cannot be measured only in kilometres of roads, megawatts of electricity or buildings constructed. It must also be measured in safety, resilience, ecological stability and the security of future generations. We cannot prevent every landslide, stop every flood or control every movement of the mountains. But we can decide where we build, how we build, what we monitor and when we act. We can also decide whether climate justice remains a slogan or becomes a principle that shapes policy and investment.

The greatest failure would not be that another disaster comes. It would be that another disaster comes—and we still call it unexpected. The mountains are mourning, but their mourning can become our wake-up call. The Rasuwa disaster must not become another chapter in a cycle of disaster, relief, reconstruction and forgetting. Let it instead mark a turning point—from reaction to anticipation, from risk-blind development to resilience, and from climate vulnerability to climate justice.

Because the Himalaya is changing. The question is whether Nepal will change fast enough to protect its people, its mountains and its future.

The author is an international development and climate change specialist working at the intersection of climate justice, diplomacy and resilient communities