Features | Environment | South Asia

A Himalayan Flood Brings Economic Collapse to Nepal’s Border Region

The destruction of the Trishuli-Bhotekoshi corridor is a local tragedy with national economic consequences.

A drone view shows mud covering buildings and properties in Trishuli, Nuwakot District, Nepal, on Aug. 27, 2026, following devastating floods.

On August 26, a massive glacier collapse near Langtang Lirung triggered a chain of flash floods and mudslides along the Trishuli and Bhotekoshi river systems. The event has not only caused damage to what was developed there but also to what was being built in that area, including infrastructure, hydropower projects, and private businesses, primarily small and medium enterprises (SMEs). Losses are estimated at more than $5 billion, which is almost one-third of Nepal’s annual budget. 

Settlements, roads, bridges, hydropower plants, trade facilities, farmland, and human lives across Rasuwa, Nuwakot, Dhading, and downstream districts were swept away or buried beneath mud and boulders. Early estimates of the damage could be made using the household-level data from these locations and the data from the 2018 economic census. But that could be misleading.

The contribution to the GDP from those areas is going to be minimal when looking at the immediate numbers. However, the share could be far more significant if we factor in indirect benefits from the river systems and economic hubs in that corridor. Especially important is the opportunity cost, as Nepal was attempting to build up a vibrant trade link with China in exactly this region. 

The human toll alone is immense. More than 1,300 people are confirmed dead in Nepal, while over 4,000 people are missing. For those who survived, the loss is not limited to houses and belongings. Families have lost relatives, farmland, livestock, food stocks, shops, vehicles, savings, identity documents, and the means to earn an income. Entire local economies in the peripheral areas of the flood-hit districts have been disrupted, which has a direct impact on key sectors such as tourism and agri-businesses. 

The Trishuli-Bhotekoshi corridor is more than a river valley. It connects mountain communities to Kathmandu, national markets, tourism destinations, hydropower investments, and cross-border trade with China. Its destruction is therefore a local tragedy with national economic consequences. 

The complete destruction of the Gyirong Port border complex is especially serious. The port was Nepal’s primary trade and tourism gateway with China. At the moment, Nepal has no fully functional border crossing point with China, which has a high cost for an economy that relies on imports of raw materials and other goods from China. 

When the flood hit, more than 300 vehicles waiting at the border were swept away. About 42 kilometers of road and 41 bridges were damaged, with road and bridge repairs alone estimated to cost 15 billion rupees ($99.4 million). 

The estimated cost to repair is one thing; it’s much more difficult to calculate the cost that accumulates when the movement of local people is limited due to the absence of infrastructure, especially in a border region. Sections of the Prithvi Highway are still blocked, delaying relief operations and disrupting the transport of goods, fuel, food, and passengers. The loss of the Gyirong-Rasuwagadhi trade route will affect importers, exporters, freight companies, customs agents, drivers, hotels, warehouses, retailers, and consumers throughout Nepal. Most of the freight companies have been damaged, with their containers being completely wiped out. 

China has closed the Tatopani customs point following the complete destruction of the Rasuwagadhi border point linking Rasuwa and Gyirong. With no functional border crossing between Nepal and China at the moment, supply chains have been disrupted. This has a direct impact on customs revenue and will raise prices for consumers due to lack of supply. 

People already suffering from the price hikes due to the Iran-U.S. war, among other global events, will have to face more severe economic hardships. Local economic centers, including Syabrubesi, Betrawati, Trishuli, and Rasuwagadhi had been developing through tourism, trade, transport, agriculture, construction, and hydropower investment. Their destruction risks reversing years of local economic progress. 

The damage to Nepal’s hydropower system will have consequences beyond the immediate loss. With approximately 431 megawatts removed from the grid and another 470 MW of projects under construction affected, the disruption threatens electricity reliability just as demand is expected to rise........

© The Diplomat