Rising temperatures are putting the stability of the Himalayan mountains under increasing pressure, as melting permafrost weakens the frozen ground that helps hold rocks and soil together. Climate experts warn that the changes could increase the risk of landslides, flash floods and other mountain hazards, while also disrupting the seasonal flow of water from snow and glaciers.

The warning was highlighted by climate author and entrepreneur Mridula Ramesh at the 11th edition of the Himalayan Echoes literature and arts festival in Nainital. She used the imagery of Lord Shiva’s locks, traditionally believed to control the force of the River Ganga, to explain how the Himalayas’ natural systems are losing some of their ability to regulate water and maintain mountain stability.

Why melting permafrost matters

Permafrost is ground made up of soil, rock or sediment that remains frozen for at least two consecutive years. In high-altitude regions, this frozen material acts like a natural binding system, helping keep mountain slopes stable.

As temperatures rise, the frozen ground begins to thaw. The loss of ice within the soil and rock can weaken slopes, making some areas more vulnerable to erosion, landslides and rockfalls.

Researchers say the consequences can extend beyond the immediate mountain environment. Settlements, roads, bridges, hydropower facilities and other infrastructure located below unstable slopes may face greater exposure to cascading hazards.

A study published in the journal npj Natural Hazards in May 2026 examined permafrost distribution and possible mass-movement risks in Himachal Pradesh’s Kinnaur district. Using machine-learning methods and numerical modelling, the researchers identified areas where degrading permafrost and unstable slopes could contribute to hazards, including avalanche and glacial lake flood scenarios.

The study provides a regional assessment of potential risks; it does not mean that a particular slope or glacial lake is certain to fail.

Warmer conditions could intensify rainfall risks

Changing temperatures may also influence rainfall patterns across the Himalayan region. Warmer air can hold more moisture, creating conditions in which rainfall may become more intense during certain weather events.

When heavy precipitation falls over steep mountain terrain, water can move rapidly through valleys and river channels. Saturated slopes may also become more vulnerable to landslides and debris flows.

The combination of thawing permafrost, retreating glaciers and intense rainfall could therefore create interconnected hazards. A single extreme weather event may trigger several problems across the same mountain catchment.

Earlier snowmelt could affect summer water supplies

Another concern is the changing timing of snowmelt. Himalayan snow and glaciers act as natural water stores, releasing water gradually into rivers as temperatures rise.

If snow melts earlier in the year, more water may enter river systems during the earlier months. This could potentially reduce the amount of snowmelt water available later in the summer, when many communities, farms and industries depend on reliable supplies.

The effect will vary across river basins and will also depend on rainfall, glacier conditions and local water management. However, experts warn that changing seasonal patterns could make water planning increasingly difficult.

A wider warning for the Himalayan region

The concern over permafrost is part of a broader climate challenge facing the Himalayas. A report published by Down To Earth in September 2026, based on research by Systemiq and partner organisations, said Himalayan glaciers were losing mass significantly faster than a decade earlier. It also highlighted the contribution of black carbon pollution to glacier melting and identified dozens of high-risk glacial lakes in India.

The report called for stronger glacier monitoring, improved early-warning systems, action to reduce black carbon emissions and more climate-resilient development in mountain states.

The Himalayan region supports communities across several countries and supplies water to major river systems. Changes in its glaciers, frozen ground and rainfall patterns can therefore have consequences far beyond the mountains.

Monitoring and preparedness become increasingly important

Scientists and climate experts stress that better monitoring is essential to understand how rapidly permafrost is changing and which locations face the greatest risks. Regular field surveys, satellite observations, hazard mapping and reliable early-warning systems can help authorities identify vulnerable areas.

Reducing greenhouse gas emissions remains important for limiting long-term warming. At the same time, local measures such as safer infrastructure planning, controlled construction in vulnerable valleys and better disaster preparedness can help reduce the impact of climate-related hazards.

The warning is not that every Himalayan slope is on the verge of collapse. Rather, the natural systems that help stabilise the mountains and regulate water are changing. Understanding those changes early could be crucial for protecting lives, livelihoods and water security across the region.