Overview
- A rock-and-ice collapse from the Birch glacier on May 28, 2025 buried much of Blatten after authorities evacuated its 300-plus residents and forced long-term displacement.
- Local recovery has been practical and quick in places, with displaced residents opening temporary businesses such as Hotel Momentum, built in 105 days to house visitors and valley residents.
- Officials started rebuilding a key road in April 2026 and say residents whose homes were not destroyed could begin returning later this year under a phased Blatten 2030 plan that targets wider returns by 2029 and reconstruction around 2030.
- Scientists link the disaster to climate-driven permafrost thaw that weakens mountain rock, but the head of the Swiss glacier monitoring network says the Birch collapse also involved an unusual build-up of rock, making direct comparisons to other events uncertain.
- Authorities have tightened monitoring of nearby glaciers and imposed precautionary road closures after isolated break-offs from the Oigschtchummun glacier this month, a sign that hazard management will shape who returns and when.