Nepal's flood disaster and the impact of climate change loom large in the icy shadow of Mont Blanc

For centuries, French and Italian mountain communities on the flanks of Western Europe's highest peak have gazed upon seemingly eternal glaciers and snow that gave the colossus its name: Mont Blanc, the white mountain.

Tarpaulins cover the ice cave of the 'Mer de Glace' glacier to prevent it from melting, at the Montenvers station in Chamonix, France, Saturday, Sept. 5, 2026. (Photo：AP）

But climate warming is dismantling the picture at alarming speed.

Europe's record heat waves this summer savaged permafrost that for millennia has acted like glue on the Alpine landscape. Defrosting cliffs came apart as high-altitude cold gave way to higher temperatures, sending rock falls cascading from the heights. A famously dangerous rock-prone gully that climbers have long braved on ascents to the summit, 4,805 meters (15,766 feet) up, became temporarily impassable.

“We weep for our mountain, the way it's changing. It hits us in the gut,” said Stéphane Bozon, a deputy mayor in Chamonix-Mont-Blanc, a French town at the foot of the giant that straddles France's border with Italy.

“From mid-July onward, we saw an increase in rock falls. We saw areas becoming difficult to access because of glacial retreat and snowmelt on the glaciers, with crevasses opening up and rock collapses making some areas difficult to reach or traverse,” he told The Associated Press.

Each degree of warming can have an outsized impact. On the Aiguille du Midi peak, which rises to an altitude of 3,842 meters (12,605 feet) in the Mont Blanc range, average temperatures for July have soared. From a chilly 1.6 C (33.8 F) in 1994, the monthly average for this July was the warmest ever recorded, at 3.3 C (37.4 F), says Meteo France, the national weather service.

“The mountain really dried out, with temperatures unlike any I had ever experienced,” Bozon said.