The Himalaya has never been a static landscape. Mountains rise and erode, glaciers advance and retreat, rivers shift their courses, and slopes fail. Nepal has always lived with these natural processes. What is changing today, however, is the context in which they are occurring. Rising temperatures, changing snow and ice conditions, retreating glaciers, evolving glacial lakes and increasing development in mountain environments are creating a more complex landscape of risk.

The question for Nepal is therefore whether Nepal is developing the scientific knowledge, monitoring systems and institutional capacity needed to understand what is changing in the mountains before those changes become disasters.

For a long time, floods, landslides, avalanches and glacier-related hazards have largely been treated as separate problems. That may be convenient for institutions and projects, but the mountains do not behave according to the categories we create. A rock, ice or snow avalanche may enter a river; the river may be temporarily blocked; water and debris may accumulate behind the blockage; and when that barrier fails, the consequences can travel rapidly downstream.

These cascading hazards are becoming increasingly important in Nepal's risk landscape. Understanding where a landslide or avalanche may occur is no longer enough. We also need to understand what may happen next: whether debris could block a river, whether a temporary lake could form, how far a flood might travel, and which roads, bridges, settlements and other infrastructure lie in its path.

The consequences of a mountain disaster are often determined not only by where it begins, but by everything it encounters along the way. This is why Nepal needs to move beyond isolated hazard assessments towards a more integrated understanding of mountain systems and the connections between hazards.

Nepal’s warning system was designed primarily to detect rising water downstream. It cannot, by itself, provide a complete picture of what is happening high in a remote Himalayan valley. A major avalanche, landslide, rockfall or ice-related failure may occur far above the nearest monitoring station. By the time its effects become visible downstream, the event may already be underway.

The country therefore needs to complement its existing Early Warning Systems with a stronger capacity for upstream observation and high-mountain monitoring. In simple terms, we need better scientific eyes in the mountains.

Satellite-based earth observation should become an increasingly important part of this effort. Nepal's Himalayan region is vast, remote and difficult to access. It is neither practical nor affordable to physically inspect every glacier, glacial lake and potentially unstable slope regularly. Satellite observations can provide broad and repeated coverage of changes occurring across the mountain landscape.

Radar-based satellite observations are particularly useful because they can provide information even when clouds and darkness limit ordinary optical observation. In Nepal's monsoon and high-mountain environment, this capability can be valuable for identifying changes in the earth's surface and areas showing unusual movement or deformation.

However, technology must be interpreted carefully. Glaciers naturally move, snow and ice conditions change, and mountain slopes may show movement without immediately failing. A satellite image cannot simply tell us that a disaster is about to happen. Its real value lies in helping identify unusual changes and directing scientific attention towards areas requiring closer investigation.

A practical approach would also be to observe broadly from space, investigate carefully on the ground and strengthen warning and preparedness where credible risks are identified. Areas showing unusual changes could be examined through field investigations and, where appropriate, equipped with cameras, ground sensors and other monitoring instruments.

No single technology will provide complete protection. A resilient mountain monitoring system must combine satellite observations, remote sensing, field investigation, weather information, river monitoring and local knowledge.

Nepal should also explore how it can strengthen its long-term Earth-observation capability through regional and international cooperation. A dedicated regional Himalayan observation initiative could have strategic value not only for disaster risk management but also for water resources, agriculture, environmental monitoring and development planning. The central issue is whether Nepal can systematically obtain, analyse, and use Earth-observation information.

Climate information presents another major challenge. Global climate datasets have transformed climate research and remain indispensable, particularly in regions where direct observations are limited. But Nepal's geography is exceptionally complex. Within a relatively short distance, elevation can change dramatically, producing equally dramatic differences in temperature, precipitation and snow conditions.

A climate grid covering several kilometres may therefore include very different environments, from valley floors to high mountain terrain. This means Nepal needs stronger capacity to develop climate information that is more suitable for its complex geography.

More high-altitude observations, improved data integration and scientifically robust downscaling can help produce information that is more useful at local and mountain scales. This work requires substantial datasets, computing capacity, appropriate scientific methods and careful validation. It is not simply a matter of downloading data and producing maps.

Yet this foundational work is essential. Without better information, Nepal will continue discussing climate and disaster risks while lacking sufficient evidence about how environmental conditions are changing across its most complex terrain.