The ski resort of Chamonix has met again to discuss the monitoring of the lake formed in 2018 on the Bossons Glacier.

Formed from increased amounts of snowmelt, the lake now carries the threat of overflowing, should there be future extended periods of warm weather.

Last year, the resort used an excavator to clear rocks from the outlet to increase the flow of the current to the Crosette waterfall. This reduced the level of the water in the lake by 1.25m, but is seen as insufficient to eliminate future risk.

A committee of experts has recommended the addition of an overflow channel, before the volume of water in the lake reaches critical levels.

The work is planned for summer and autumn of 2023.