Essay by Dr Zhengxu Wang, re-published here in The Multiplural World, Sept 2, 2026 (with related readings further below)
The Nepal-Tibet (China) rock-ice avalanche disaster on the Himalaya mountains border highlights a growing front of the global warming crisis. While rising sea levels, extreme weather and drought all remain concerns, destabilised ice and snow at high altitudes is increasingly a threat.
(Dr Zhengxu Wang is a distinguished professor at the School of Public Affairs, Zhejiang University in China. This essay by him originally appeared in the South China Morning Post on September 2, 2026, titled ‘Nepal-China flood disaster highlights a growing front of the global warming crisis’.)
On August 26, a section of glacier collapsed at an altitude of more than 5,000 metres (16,400 feet) on the Nepalese side of the Himalayas. The falling ice and rock accelerated down a steep valley at about 50 metres per second, scouring debris and transforming into a high-speed mudslide that slammed into Gyirong Port on the Chinese side just seven minutes later.
The force of the flow largely buried and obliterated the border facilities. Hundreds of people, many of them travelers, remain missing on the Chinese side. Across the border in Nepal, entire villages were swept away, leaving hundreds dead and thousands unaccounted for.
For decades, the defining image of climate vulnerability has been the low-lying island nation, where rising seas threaten to erase entire communities from the map. That threat is real, urgent and unfinished business. However, the catastrophic mudslide that tore through the China-Nepal border obliges humanity to look beyond the waterline and consider a more complex, multidimensional map of global warming risk.
The iconic risk remains sea-level rise. It is slow, inexorable and already under way. Coastal megacities from Shanghai to Mumbai to New York are investing heavily in sea walls and surge barriers. Small island states are exploring relocation treaties and purchasing land abroad as a form of climate insurance. The very predictability of this threat has allowed societies to develop institutional responses.
The second most immediately felt risk from global warming is extreme rainfall and the catastrophic flooding it brings. For several years, traditionally drier places such as Beijing and large swathes of inland China have suffered disastrous floods that overwhelmed infrastructure, affecting millions and exposing the limits of urban drainage systems never designed for the intensity of rain now falling from a warmer atmosphere.
The third risk is drought. This summer, a severe and persistent drought coupled with record-breaking heatwaves created a crisis across much of Europe. The prolonged lack of rainfall pushed major waterways, including the Rhine, Danube and Loire rivers, to historically low levels, disrupting river transport and forcing cargo vessels to reduce their loads. France alone faces an estimated €10-15 billion (US$11.6-17.4 billion) in heat-related losses and a projected 35 per cent drop in maize yields.
Across Europe, low river levels and wildfires have exposed unexploded ordnance from World War II that had long been submerged or buried – another stark reminder of how global warming and the climate change it causes are already profoundly affecting our lives.
Now the rock-ice avalanche disaster at the Gyirong border crossing and downriver has brought a fourth threat into terrifying focus. Scientists call these events ‘cryo-hydrological hazards’, that is, disasters born from destabilised ice, snow and meltwater in rapidly warming high mountain regions. The high-altitude China-Nepal border region, which has long been valued by travellers for its dramatic ice-covered peaks, is warming significantly faster than the global average. Since 1981, the number of snow-cover days in southern Tibet has fallen by an average of 12.36 days per decade. Between 1985 and 2020, the Qinghai-Tibet Plateau lost roughly 18 per cent of its glacier area.
The cascade was a classic cryo-hydrological disaster chain: a high-altitude glacier fracture triggered an ice-rock avalanche that rapidly evolved into a high-speed debris flow. Travelling roughly 22 kilometres in minutes, the mudslide slammed into Gyirong Port and largely levelled the border facilities. The extreme speed left virtually no window for early warning.
This is not a one-off. In 2022, a glacier collapse on Italy’s Marmolada peak killed 11 climbers. In 2025, a rockslide and ice collapse in the Swiss village of Blatten claimed a life even after the area was evacuated. The Alps, like the Himalayas, are becoming increasingly unstable as permafrost thaws and glaciers retreat. Europe is among the fastest-warming continents.
Mountain communities now face a threat that is sudden, catastrophic and often virtually unpredictable. The Gyirong disaster shows that a warming planet also thaws permafrost and forces ice to retreat, removing the structural “glue” that once held together steep mountain slopes. A warm spell, heavy rain or minor tremor can now produce far more destructive outcomes than a generation ago.
For mountain communities across the Hindu Kush Himalayas, the Alps, the Southern Alps of New Zealand and Alaska, this is a daily reality. The question is whether humanity can now expand its imagining of ecological vulnerability to include the valleys below melting mountain glaciers and the weakening mountains that hold the glaciers up.
Even as such cascading hazards multiply and claim lives without regard for nationality or ideology, the world remains consumed by interstate enmity and wars… and by a mad race to dig up and burn yet more fossil fuels. In the face of a planetary, global warming crisis that respects no borders, why do governments and countries continue to pour so much energy into rivalry instead of creating or expanding shared resilience?
The world has spent decades watching the oceans rise and planning megaprojects to hold back the rising waters. Now it is time to also prepare for the mountains to fall… to recognise that the real enemy is the global warming crisis that threatens us all.
Related readings:
* The ‘Asian water tower’ of the Tibetan Plateau is starting to wobble and lose stability, a scientific study reveals, report in South China Morning Post, Aug 27, 2026 The Tibet Plateau, also known as ‘Asia’s water tower’ is heading towards a more unpredictable and unstable future, according to a new study measuring the plateau’s stability. (Read the report here in pdf format: The Tibetan Plateau is starting to wobble and lose stability, a scientific study reveals)
* When a glacier-covered mountain falls: How ice and rock triggered Nepal’s catastrophic flood, by Umesh Haritashya, in The Conversation, Aug 31, 2026 (Umesh Haritashya is Professor of Earth, Environment and Sustainability, and Director of Sustainability Programs, University of Dayton, USA.)
* Deadly rock-ice avalanche in Nepal most likely caused by weakened bedrock, short, interactive report in New York Times, Sept 1, 2026
* Glacier loss across the Himalayas mountain range directly threatens two billion people, report re-published in The Multiplural World, March 22, 2026 (with related reports) Military conflicts such as the war in Iran are diverting global attention away from global warming and the ecological crisis, scientists warn. This report was first published in the South China Morning Post on March 21, 2026.
* Update on August 31 of the Aug 26 rock-ice avalanche disaster in Himalayas:
The rock-ice avalanche (flood) disaster in Nepal and Tibet was unleashed by a glacier and rock collapse on the morning of Wednesday, August 26 at Langtang Lirung mountain peak on the Nepalese side of the shared border. Nepal’s disaster agency reported on Monday, August 31 that 1,003 deaths have been counted there, with 3,916 people missing, including 583 foreigners. Chinese authorities reported in their latest update on August 30 16 deaths and 546 people still missing, including 261 foreigners. In Nepal, rescuers were racing to reach hundreds of workers believed to be trapped inside tunnels at hydroelectric projects damaged by the floods. About 900 workers are missing from 12 projects, with roughly 500 believed to be trapped in tunnels, according to Nepalese authorities.–Associated Press, Sept 1, 2026
…For the last decade, the Gyirong Port has been the main link between China and Nepal, accounting for almost one third of China’s trade with Nepal, much of it electric vehicles going to Nepal, and for more than 180,000 people traveling between the two countries. The five-storey port complex was in one of the most vulnerable places possible for a border crossing, perched on a narrow strip of land in a steep gorge where two rivers meet. Both rivers, fed by glaciers, descend about 10,000 feet before they come together at Gyirong Port… But experts say there are few alternatives in this steep mountain region where disasters continue to strike. The Gyirong border crossing only became a major trade route over the last decade after another crossing further east, between Zhangmu in China and Kodari in Nepal, was damaged in the 2015 Nepal earthquake…–New York Times, Aug 31, 2026
* Last-minute flood warning saved over 900 schoolchildren in Nepal, Reuters news agency, Aug 31, 2026 …Only older pupils, ages 11 to 18, were at school when the floods hit on the morning of August 26, which aided the quick evacuation. The younger students did not start class until 10 a.m. “They were old enough to run immediately,” the school principal said in a phone interview on August 31. “It would not have been possible to save everyone had kindergarten and primary school students also been there.”…
