A significant increase in landslides has been recorded in the Mont-Blanc massif during the summer of 2026, with 450 landslides reported—far above the normal number. Concerns have been raised, particularly following a major disaster on the border between Nepal and China on August 26, 2026, where a landslide caused by the collapse of a glacier and rock base triggered a torrent of unprecedented magnitude. This event devastated several villages in the valley, with a preliminary death toll of over 1,400 people and 5,600 missing. The disaster was linked to a glacial lake outburst flood (GLOF), which occurs when a glacial lake suddenly breaks free, releasing a large volume of water and debris. This type of event is increasingly linked to the retreat of glaciers, which has accelerated due to climate change. According to Kang Shichang, director and researcher at the Institute of Mountain Risk and Environment at the Chinese Academy of Sciences in Chengdu, glaciers in the Qinghai-Tibet Plateau have decreased by about 24% over 60 years, and in southern regions such as the Himalayas, Gangdise Mountains, and Nyenchen Tanglha, the decrease is about 40%. This retreat has contributed to the formation and expansion of glacial lakes, increasing the risk of catastrophic floods if rocks destabilize. In the French Alps, villages in Haute-Savoie, including Chamonix, are at risk due to the potential collapse of several glaciers, such as the Taconnaz, Bossons, and Charpoua glaciers. Saint-Gervais is threatened by the Tête-Rousse glacier. Forecasts suggest that by 2050, 45 to 65% of Alpine glaciers will have melted, and by 2100, 100% of Alpine glaciers will have melted. According to Séverine Bernardie, a landslide expert at BRGM, the volumes of ice and rock involved in the Nepal disaster are not comparable to those in the Alps. She noted that the last major mudflow in Switzerland, which destroyed the village of Blatten on May 28, 2025, carried 10 to 20 times less volume than in Nepal. Recent events in the Sixt-Fer-à-Cheval massif in Haute-Savoie on August 4, 2026, and August 14, 2026, saw two hikers carried away by mudflows, though these events were on a smaller scale. Historical records indicate that a debris flow on July 12, 1892, devastated the village of Saint-Gervais in Haute-Savoie, killing 175 people. This event was caused by the rupture of a water pocket inside the Tête-Rousse glacier. While glacial water pockets and risky lakes in the Alps are regularly monitored and drained, the possibility of a sudden, unmonitored event remains. These risks are growing as climate change accelerates glacier retreat and increases the frequency of extreme weather events. Authorities continue to work on early warning systems and risk management strategies to protect mountain communities from potential disasters.