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Scientists say that more comprehensive early-warning systems downstream could have saved a “significant number of lives.”
Nepal Flash Floods: Damaged houses lie deluged in sludge after flash floods at Trishuli Center in Nepal’s Nuwakot district. (AFP photo)
The glacier collapse that triggered a devastating landslide and flooding in Nepal and China showed signs of trouble days before the disaster, according to a new scientific report cited by CNNraising fresh questions about whether better monitoring and early-warning systems could have reduced the loss of life.
The findings come from the HiRISK scientific consortium, which monitors hazards in mountain environments. Its report said that, in hindsight, there were visible indications that the glacier and surrounding terrain were changing before the catastrophic collapse. Among the warning signs was meltwater that had turned noticeably brown, along with evidence of a crack spreading into the bedrock slope around the glacier. These changes were observed in the days leading up to the collapse.
Read More: Danger Isn’t Over: How Unstable Glaciers Could Trigger New Landslides And Floods In Nepal
The report does not suggest that the disaster could easily have been predicted. Instead, it highlights the enormous difficulty of monitoring unstable terrain across the Himalayas, where remote locations, rapidly changing conditions and limited ground-based infrastructure can leave potentially dangerous areas effectively invisible to authorities.
Still, scientists concluded that more comprehensive early-warning systems downstream could have saved a “significant number of lives.”
Once the glacier collapse began, the initial landslide moved so rapidly that conventional warning systems would probably not have provided enough time to evacuate people at a border checkpoint among the first locations hit by the disaster.
Farther downstream, however, the situation could have been different. According to the HiRISK report, areas where warning times of 10 minutes or more were possible could potentially have benefited from comprehensive systems capable of detecting the approaching flood and quickly communicating the danger to vulnerable communities.
The disaster has therefore renewed attention on the Himalayan region’s glaring gaps in hazard monitoring, particularly for glacier-related events.
Some early-warning infrastructure had recently been installed in the region, but the systems were primarily designed to monitor glacial lakes in China. There was no operational system specifically covering glacier-related hazards in the area where the collapse occurred, the report said.
The issue is also becoming a matter of cross-border cooperation.
Chinese and Nepali authorities had met as recently as May to discuss strengthening cooperation on monitoring natural hazards in the Himalayas, a government official who attended the meeting said as quoted by CNN. Yet the latest disaster has demonstrated how much more difficult it is to translate such cooperation into real-time monitoring and warnings on the ground.
Experts say the problem is particularly acute because Himalayan hazards do not respect political boundaries. A landslide or glacial flood originating on one side of the border can rapidly affect communities, roads and infrastructure downstream in another country.
Austin Lord, a senior fellow in the Energy, Water and Sustainability programme at the Stimson Center, described the glacier as being in a “blind spot,” saying there was “almost no way” anyone could have detected the event beforehand.
But Lord also pointed to a broader lesson from the catastrophe: “greater communication, information sharing, and collaborative analysis of transboundary risks between Nepal and China are sorely needed.”
Quick Answers
Ask News18Better monitoring and comprehensive early-warning systems could help prevent future Himalayan disasters from causing massive loss of life. While scientists cannot always predict the exact timing of a glacier collapse, improved monitoring can identify signs of growing instability, such as spreading cracks or changes in meltwater. This would give authorities valuable time to alert and evacuate vulnerable downstream communities.
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The News Desk is a team of passionate editors and writers who break and analyse the most important events unfolding in India and abroad. From live updates to exclusive reports to in-depth explainers, …Read More
September 02, 2026, 1:14 PM IST
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