Introduction A rockfall in the hamlet of Palleusieux, in Pré-Saint-Didier, has forced the evacuation of residential buildings and the closure of a section of road on the approach to Courmayeur, underlining ongoing slope instability on the Mont Blanc side of the Aosta Valley. The incident occurred on 31 March 2026 and prompted immediate safety measures after rock debris reached areas close to inhabited properties. According to AostaSera, authorit…
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