Mission to reduce chances of glacial lake's outburst fails to achieve target. The Thorthormi glacial lake in northern Bhutan is considered the country's likeliest climate-induced disaster. The lake, perched at a height of more than 4,400 metres, is swelling because of melting ice, and is in danger of bursting its wall. Efforts by the Bhutanese government to lower the lake's water level is yet to eliminate the risk of a disaster, which may sweep away communities living in the upper catchment of the Pho Chu river, fed by the glacier.