Nepal’s Hydropower Dream Faces a New Test as Deadly Floods Expose Climate Risks

Nepal has spent years building its economy around one of its greatest natural advantages: its rivers. The Himalayan nation has enormous hydropower potential, and electricity generation from those rivers has increasingly become important not only for domestic power needs but also for exports.

That strategy is now facing a major test.

Deadly floods that struck Nepal last week damaged hydropower facilities in Bagmati province, affecting 431 megawatts of generation capacity, equivalent to around 10% of the country's total electricity generation capacity. The disruption has forced Nepal to suspend electricity exports and prepare to import power from India to meet domestic demand.

The immediate priority is rescue, recovery and restoring damaged infrastructure. But the disaster has also raised a much bigger question: how should Nepal expand its hydropower industry when the same mountain environment that provides its energy resources is becoming increasingly difficult to predict?

Nepal’s Hydropower Strategy Comes Under Pressure

Hydropower is central to Nepal's electricity system. The country has limited alternatives at the scale required to satisfy rising power demand. Its lack of coal- and gas-fired generation capacity, combined with relatively limited potential for wind and solar power, makes hydropower especially important.

This dependence has also created an opportunity.

Nepal has increasingly moved from being primarily an electricity importer to becoming an exporter during periods of surplus generation. Electricity sales have become a growing source of foreign-exchange earnings, with hydropower exports accounting for nearly one-tenth of Nepal's annual exports in the year ended July, according to data cited in the Reuters report.

The country's ambitions are much larger.

Companies including Adani Group, NHPC and GMR have pledged involvement in financing a major expansion of Nepal's hydropower capacity over the coming decade, with electricity intended in part for India's large power market.

The flood disaster therefore comes at a critical moment. Nepal is trying to expand an industry that is simultaneously becoming more economically important and more exposed to environmental risks.

What Happened to Nepal’s Hydropower Capacity?

The floods struck Bagmati province, one of Nepal's major hydropower-producing regions.

According to the energy ministry official quoted by Reuters, 431 MW of generation capacity was affected. Eleven hydropower projects that were either operating or under construction were hit across two districts of the province. Nearly 900 people were reported missing in power plants in those districts.

The consequences extend beyond individual power stations.

When generation capacity is suddenly removed from an electricity system, utilities must find alternative sources of supply. For Nepal, the immediate solution is to obtain electricity from neighboring India.

This highlights an important feature of energy security: producing electricity domestically does not automatically guarantee uninterrupted supply. Infrastructure must also be able to withstand extreme events.

A power plant can be highly productive during normal conditions but become a major vulnerability if its location or supporting infrastructure is exposed to floods, landslides or other hazards.

Why Climate Change Matters for Himalayan Hydropower

The latest disaster has intensified concerns about the changing environmental conditions in the Himalayas.

Hydropower projects depend on rivers, rainfall, snow and glacier-fed water systems. Historically, engineers could use past weather and river-flow patterns to help estimate future risks.

But climate change complicates that approach.

Environmental experts cited by Reuters warned that historical hydrology may no longer provide a sufficiently reliable guide for infrastructure planning. Changes in glaciers, snowlines and mountain conditions can affect the physical environment around rivers and hydropower facilities.

This does not mean hydropower suddenly becomes an unsuitable energy source. Rather, it means that the assumptions used when designing and financing projects may need to change.

A project expected to operate for decades cannot be planned solely around what happened during the previous few decades.

Infrastructure Must Be Designed for Future Conditions

One of the biggest lessons from the disaster is that climate risk needs to be considered over the entire lifetime of an infrastructure project.

That involves more than estimating how much water a river will carry.

Developers may also need to consider the stability of surrounding slopes, the possibility of unusually severe flooding, changing glacier conditions, sediment movement and the resilience of roads and transmission infrastructure.

The Reuters report noted that the scale of the flooding exceeded conventional warning systems, raising questions about whether existing approaches to Himalayan infrastructure planning are sufficient.

For Nepal, this could become an important consideration as new hydropower projects move from planning to construction.

The Economic Stakes Are Rising

Hydropower is no longer simply an infrastructure sector for Nepal. It is increasingly connected to the country's broader economic strategy.

Electricity exports have grown rapidly over the past decade, with Reuters reporting that export revenues rose by an average of 75% over that period. Hydropower exports represented nearly 10% of Nepal's annual exports in the year ended July.

That creates a powerful economic incentive to continue developing the country's rivers.

Successful hydropower development can potentially provide Nepal with several benefits:

• More reliable domestic electricity
• Greater export earnings
• Increased foreign investment
• New infrastructure and employment
• Stronger economic ties with neighboring countries

But greater dependence on hydropower also means that damage to generating assets can have broader economic consequences.

A major flood can simultaneously affect electricity supply, export revenue, construction schedules, investor confidence and public finances.

Could the Disaster Change Investor Thinking?

Investors in large infrastructure projects typically examine historical data when evaluating risks.

But a changing climate creates a difficult problem: historical performance may not fully represent future conditions.

That could influence how hydropower projects in Nepal are financed.

Investors may increasingly ask questions such as:

• How resilient is the project to extreme flooding?
• What happens if construction is delayed by a major disaster?
• Is the surrounding road network reliable during emergencies?
• Can power transmission continue if nearby infrastructure is damaged?
• What level of insurance protection is available?
• How quickly could a damaged facility return to operation?

These questions could raise upfront costs.

However, higher resilience spending may ultimately reduce long-term losses. Spending more on stronger infrastructure, improved monitoring and better emergency systems can be viewed as a form of risk management rather than simply an additional construction expense.

Nepal’s Reliance on Hydropower Creates a Difficult Choice

The fundamental challenge is that Nepal cannot easily walk away from hydropower.

The country needs more electricity as demand increases, while its options for large-scale alternative generation are constrained. At the same time, its geographic position gives it access to rivers with significant hydropower potential.

This creates a difficult balancing act.

On one side is the economic opportunity. Nepal can develop renewable electricity and potentially sell surplus power to India.

On the other side is the physical risk of building infrastructure in a mountainous environment where extreme weather and changing environmental conditions can cause serious disruption.

The answer may therefore not be to stop hydropower development, but to change how projects are selected, designed and operated.

What Could Nepal Do Next?

The immediate task is recovery.

Nepal's authorities need to assess the condition of affected projects, determine the scale of repairs and establish how long damaged generation capacity will remain offline. The country is also expected to rely on electricity imports from India while domestic shortages persist.

The longer-term response could be more significant.

Better Risk Assessment

Future projects may need environmental and geological assessments that account for a wider range of extreme scenarios.

Stronger Early-Warning Systems

The flooding demonstrated the limitations of conventional warning systems. More advanced monitoring and communication systems could help authorities and operators respond more quickly when dangerous conditions develop.

More Resilient Project Design

Hydropower facilities and related infrastructure may need to be designed with greater protection against flooding, landslides and other hazards.

Diversification of the Energy System

Hydropower is likely to remain central to Nepal's electricity system, but developing complementary energy sources could reduce the consequences of losing generating capacity during extreme events.

Diversification does not necessarily mean replacing hydropower. Instead, it can provide additional flexibility when hydro generation is disrupted.

Why This Matters Beyond Nepal

Nepal's experience offers a broader lesson for countries investing heavily in renewable energy infrastructure.

The global transition toward cleaner electricity requires enormous investment in power plants, grids, transmission networks and storage systems. Renewable energy can reduce dependence on fossil fuels, but renewable infrastructure is still physical infrastructure—and physical infrastructure remains exposed to nature.

Climate change makes this issue more complicated.

A power plant designed for yesterday's climate may not necessarily be suitable for tomorrow's conditions.

For investors, governments and energy companies, this means climate resilience could increasingly become part of the economic calculation behind renewable-energy projects.

Nepal's hydropower sector illustrates the challenge particularly clearly because its energy opportunity and environmental vulnerability come from the same geography.

FAQs

Why is hydropower so important to Nepal?

Hydropower supplies almost all of Nepal's electricity and is central to meeting rising domestic demand. The country also increasingly uses hydropower to generate export revenue.

How much Nepalese power capacity was affected by the floods?

Nepal's energy ministry said 431 MW of generation capacity was affected, representing about 10% of the country's total generation capacity.

Will Nepal continue developing hydropower?

The disaster creates additional risks, but Nepal has few alternatives capable of replacing hydropower at the required scale. The country's long-term expansion ambitions therefore remain economically important, although project planning and risk assessment may receive greater scrutiny.

Why could climate change affect hydropower projects?

Changes in rainfall, glaciers, snowlines and mountain conditions can alter the environmental risks surrounding hydropower infrastructure. This makes historical weather and river-flow patterns less certain as a guide to future conditions.

Why is India important to Nepal's electricity sector?

India is both a neighboring electricity market and an important source of emergency power for Nepal. Following the floods, Nepal halted power exports and planned to buy electricity from India to cover domestic shortages.

What is the biggest lesson from the floods?

The central lesson is that expanding renewable energy capacity must go hand in hand with resilience. Hydropower projects need to be assessed not only for their ability to generate electricity under normal conditions, but also for their ability to withstand increasingly uncertain environmental risks.

Conclusion: Nepal’s Hydropower Future Will Depend on Resilience

Nepal's hydropower opportunity remains substantial, but the latest floods have exposed the vulnerability behind that opportunity.

The country needs electricity for its own economic development and sees significant potential in selling surplus power to India. Hydropower has already become an important export industry, making continued investment financially attractive.

Yet the destruction caused by the floods shows why capacity expansion cannot be measured only in megawatts.

The next phase of Nepal's hydropower development may need to focus equally on resilience, risk assessment, emergency preparedness and long-term environmental change.

The choice is not simply between developing rivers and abandoning them. The more important question is whether Nepal can develop its hydropower resources in a way that remains reliable in a changing Himalayan environment.

For investors and policymakers, that could become the defining issue for Nepal's energy sector in the years ahead.