Pacific Money | Environment | South Asia

The Lasting Economic Damage From the China-Nepal Flood 

Beyond the immediate devastation, the abrupt closure of the China-Nepal trade corridor – again – will reshape the local economy for years to come. 

Satellite images show Gyirong, a border crossing and trading hub on the China-Nepal border, before and after the floods of Aug. 26, 2026.

Around 8:40 on the morning of August 26, a section of glacier collapsed on the north side of the Langtang range, near Nepal’s border with Tibet, three minutes after a magnitude 4.4 earthquake on the Chinese side. The impact registered as a magnitude 5.2 seismic event, which the U.S. Geological Survey initially logged as a separate earthquake before concluding it was the landslide itself. Scientists say warming likely helped trigger the glacier’s collapse. 

The debris entered the Lhende Khola, a small river that crosses into Nepal. It blocked the river roughly 20 kilometers upstream from the China-Nepal border crossing at Rasuwagadhi. When the blockage eventually broke, water levels in the Trishuli River surged by as much as nine meters in just 30 minutes. 

It is now the deadliest flood disaster on record in Nepal. The confirmed death toll stood at 987 in Nepal as of the morning of September 2, with 16 more dead in Tibet. Roughly 4,500 people remain missing on both sides of the border. Among them are hydropower workers, customs and immigration staff, security personnel, trekking guides, and some 700 foreign nationals, including pilgrims bound for Mount Kailash. 

According to UNICEF, 17,000 children are affected, 18 schools were destroyed, and 20 more damaged. The government’s preliminary damage estimate is 200 billion rupees ($1.3 billion). 

I was born in Nepal, and I study the economics of natural disasters, including floods in Nepal. All my experience and expertise suggests that these numbers – both deaths and damage – are going to keep going up.

But there is an aspect of the damage that isn’t being included in the counts: the opportunity cost of a broken trade connection.

On July 8, 2025, a supraglacial lake burst upstream in Tibet and sent a flood down the same river. It destroyed the Miteri Bridge linking Nepal and China, wrecked a dry port still under construction at Timure, and killed nine people. Before the flood, roughly a hundred container trucks crossed at Rasuwagadhi each day. Afterward, trade stopped entirely, and did not resume until the first day of 2026.

The closure from the flood lasted for almost six months, causing significant damage far beyond the cost of repairing the bridge. In the six months following the 2025 flood, trade through Rasuwagadhi fell 95 percent, from $302 million to $15 million, according to an analysis of Nepal’s own customs accounts by the Stimson Center. A fraction of that trade was redirected to Kora La, a crossing at roughly 4,650 meters of elevation in Upper Mustang that clears two or three cargo vehicles on a good day. Every dollar that arrived there came alongside roughly $3.30 lost at Rasuwa. The rest of Nepal’s trade went south, to India.

The bridge was eventually rebuilt, and the crossing reopened. But the trade was shut for half a year. Now it is destroyed again, along with the customs buildings on both sides, 19 road bridges and 40 kilometers of road. How long will take to resume trade this time?

Even worse, as of last month, before the August 26 flood, not one of Nepal’s three crossings with China was fully operational.

A trade route that shuts down for six months (or more) every year or two is not one an importer builds a business around, however good the bridge looks the day it reopens. And the cost of these repeated disruptions is being borne by the local........

© The Diplomat