Water trapped behind glacial debris that buried the village of Blatten and blocked a river has sparked warnings of further evacuations.

The Birch Glacier above the village of Blatten collapsed and caused a landslide that has buried most of the village. Authorities had evacuated residents earlier this month, but one person is missing.

Blatten is now buried in rock and mud, and the clean-up operation is on hold because the tonnes of debris have blocked the River Lonza, causing a flood risk. So it is too soon to