Alps Face Surge in Rockfalls as Warming Thaws Permafrost

Record-breaking summer heat has accelerated the thawing of permafrost in the Alps, leading to a surge in rockfalls and glacier retreat around Mont Blanc, Europe's highest peak. This phenomenon is altering the iconic landscape and impacting climbing routes, with experts warning of increased instability. July's average temperature at Aiguille du Midi, a peak in the Mont Blanc range, reached 3.3 degrees Celsius (37.4 degrees Fahrenheit), marking the warmest July on record there, according to Meteo France. This extreme heat has significantly impacted the permafrost, which for millennia has acted as a natural cement holding mountain faces together. As this ice thaws, cliffs are becoming unstable, sending rockfalls cascading down. Ludovic Ravanel, a researcher specializing in climate change's impact on mountain environments, anticipates approximately 400 rock collapses in the Mont Blanc massif during 2026. This projection is about ten times the number recorded two decades ago and approaches the nearly 300 collapses seen during the severe season of 2022.