How Rs 64.8 lakh crore of India’s GDP is at risk due to Himalayas melting glaciers? What can happen by 2100?

The rapid retreat of Himalayan glaciers is emerging as not just an environmental issue but also an economic and water-security hurdle for India. A new report estimates that economic activity equivalent to 21.5% of India’s FY24 GDP, or around Rs 64.8 lakh crore, relies on the Himalayas and their water systems. The figure does not signify that glacier melt will directly wipe out one-fifth of India’s GDP; rather, it measures economic activity reliant on Himalayan water. 

Himalayas see glacier decline

The Himalayas act as natural water reservoirs, storing precipitation as snow and ice and releasing meltwater into rivers. These water systems promote agriculture, industries, cities and hydropower across large parts of India.

The Indus, Ganga and Brahmaputra river systems are closely linked to the Himalayan region. Agriculture in the Indo-Gangetic plains, tea cultivation in Assam and West Bengal, hydropower in the Northeast and several downstream economic occupations depend on these river systems. 

A glacial lake burst in Tibet, sending massive floods toward Nepal.

Terrifying scenes show the sheer force of the water sweeping through the area. pic.twitter.com/tMbK8kfD7W

— SilencedSirs◼️ (@SilentlySirs) August 27, 2026

Government data confirms continuing glacier retreat. The Ministry of Earth Sciences has reported an average retreat rate for Hindu Kush Himalayan glaciers, with massive variations across the Indus, Ganga and Brahmaputra basins. 

What is ‘Peak Water’?

One of the pressing concerns is the possibility of Himalayan river basins reaching “peak water”. This means when glacier meltwater crosses its maximum contribution to river flows before declining as the volume of stored ice reduces.

Numerous Himalayan river basins could reach this phase around the middle of this century. Under present trajectories, the Hindu Kush Himalaya could lose up to 80% of its current glacier strength by 2100, thus producing long-term uncertainty over water availability. 

Black carbon causing climate change

Climate change is not the sole cause behind glacier loss. The report underscores that black carbon, or soot developed through incomplete combustion, is a crucial regional contributor.

When black carbon settles on snow and ice, it darkens the surface and aggravates the absorption of sunlight, accelerating melting. The report reasons around one-third of Himalayan glacier mass loss to South Asian black carbon. Brick kilns are identified as a major cause of such emissions. 

What India needs to do?

The report urges for preventive steps including cleaner brick-making technologies, strengthened glacier monitoring, enhanced early-warning systems and better coordination across the Himalayan region.

India has also implemented institutional mechanisms to monitor glaciers, including a Steering Committee on Monitoring of Glaciers and the Centre for Cryosphere and Climate Change Studies at the National Institute of Hydrology, Roorkee. 

The main hurdle is therefore not restricted to preventing glacier melt. It also involves preparing agriculture, cities, infrastructure and water systems for a situation in which Himalayan water flows become variable.