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Story summary
- Deputy mayor Stéphane Bozon reported rock-fall incidents surged to an estimated 400 this summer.
- Permafrost melt this summer triggered numerous rock collapses across the Mont Blanc massif.
- Mountain guide Stuart MacDonald cancelled a summit expedition because recent rock-fall risk made the route unsafe.
- Researcher Ludovic Ravanel warned many Alpine slopes stay stable only because ice, and further warming could trigger more collapses.
