2026年8月26日（周三），尼泊尔喜马拉雅山区及中国西藏边境地区发生大规模山洪和泥石流灾害13。各方报道的死亡人数存在差异：有来源称尼泊尔至少8人死亡12，另有来源指出至少9人死亡4，还有报道称尼泊尔与西藏边境地区至少17人遇难3。中国西藏边境一侧也因泥石流造成重大伤亡1。灾害导致多个村庄、房屋和桥梁被毁14。
此次灾害造成大量人员失踪，其中384名游客失踪，包括来自印度、美国、英国和马来西亚等国的291名外国游客24。此外，有13名武装警察失踪3。基础设施受损严重，尼泊尔430兆瓦电力供应受到影响，占全国3.2吉瓦水电总装机容量的12%以上4。通往加德满都的主要道路已关闭3。在中国西藏一侧，吉隆县发生泥石流，导致吉隆口岸及当地通讯、电力和道路中断，并切断了日喀则地区的道路4。
灾害发生后，救援行动在边境两侧展开，目前已救出12人3。尼泊尔总理巴伦德拉·沙阿指示军警参与救援，并转移低洼地区居民14。尼泊尔官员纳伦德拉·帕里亚尔表示，预计可能会有重大人员伤亡或财产损失1。由于水位过高，尼泊尔的救援直升机无法降落4。尼泊尔政府发言人萨斯米特·波克雷尔表示，政府已向印度和中国请求救援协助2。中国国家主席习近平下令“全力”搜救失踪人员、救治伤者，并要求加强监测预警14。
关于灾害成因，有来源称系冰川冰岩雪崩引发2，有来源指为过量积雪融化流入博特科西河所致3，另有来源称由暴雨引发4。国际山地综合发展中心气候专家指出，雪崩来自尼泊尔一侧的冰川，并强调兴都库什喜马拉雅地区冰川自2000年以来冰损失率已翻倍，极端天气事件日益频繁2。受灾最严重的尼泊尔拉苏瓦地区在去年8月曾因类似山洪灾害遭受重创2。对于去年同地灾害的死亡人数，有来源称造成9人死亡并冲毁中尼“友谊桥”24，另有来源则称造成18人死亡3。
Massive flash floods and mudslides struck the border region between Nepal and China's Tibet on Wednesday, August 26, 2026, devastating villages and infrastructure 134. The Rasuwa district, located north of Kathmandu, was reported as the hardest-hit area in Nepal 23, while the Gyirong port area in Tibet also suffered severe damage 4. Conflicting reports have emerged regarding the death toll, with some sources stating at least eight people were killed 12, others reporting at least nine fatalities 4, and another source claiming at least 17 people have died 3. Additionally, hundreds of people are missing, including 384 tourists, of whom 291 are foreigners from India, the United States, the United Kingdom, and Malaysia 24. Thirteen armed police officers are also reported missing, while 12 individuals have been rescued so far 3.
The Bhotekoshi River experienced severe flooding around 9 a.m. on Wednesday, triggered by a combination of factors including a glacier ice and rock avalanche, excessive snowmelt, and heavy rains 234. An avalanche originated from a glacier on the Nepalese side, according to climate experts from the International Centre for Integrated Mountain Development 2. The deluge swept away homes, bridges, and roads, leading to the closure of the main highway to Kathmandu 34. In Nepal, 430 MW of power supply was affected, accounting for over 12% of the country's 3.2 GW total hydropower capacity 4. On the Chinese side, mudslides in Gyirong County severed roads, communications, and power in the Shigatse region 4.
In response to the crisis, Nepalese Prime Minister Balendra Shah directed military and police forces to assist in rescue operations and evacuate residents in low-lying areas 14. However, rescue helicopters in Nepal were unable to land due to high water levels 4. Nepalese government spokesperson Sasmit Pokharel stated that the government has requested rescue assistance from both India and China 2. Chinese President Xi Jinping ordered exhaustive search and rescue efforts for the missing, treatment for the injured, and enhanced monitoring and early warning systems 14. Nepalese official Narendra Pariyar warned of potentially major casualties and property losses 1. This region is highly vulnerable; the Lhende Khola River has experienced two floods within 14 months, and experts note that glacier ice loss rates in the Hindu Kush Himalayas have doubled since 2000 due to climate change 2. Last year, a similar flash flood in the Rasuwa district caused by a glacial lake outburst resulted in either nine or 18 deaths, depending on the source, and destroyed the China-Nepal Friendship Bridge 234.
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