The Mont Blanc glacier flood was a devastating outburst flood that occurred on 11 July 1892. The disaster took place at night-time when the Tête Rousse Glacier suddenly released 200,000 cubic meters of water from large pockets of water which had accumulated within the structure of the glacier. The collapse of the glacier and sudden release of water completely destroyed the hamlet of Bionnay and flooded the bath house in the town of Saint-Gervais, reaching as far as the hamlet of Le Fayet. Contemporary accounts show that over 200 people lost their lives in the villages. Everything in the path of the rushing water, mud and boulders was swept away, leaving behind some 800,000 cubic metres of sediment.