[2] Held in place by a terminal moraine, Imja Tsho threatens downstream communities with the potential for a glacial outburst flood.

The catchment of Imja Tsho occupies the northeastern part of the Dudh Koshi sub-basin.

These two glaciers coalesce approximately 3.5 km above the terminus and flow westwards just beneath the trekking path of Imja Tse.

Based on a newly released image of 21 November 2009 on Google Earth, the Imja Tsho has attained an area of 1.055 km2 as a result of which the growth rate of the lake has increased to 0.025 km2 per year from 2000 to 2009.

In 2016, the United Nations Development Programme together with the Government of Nepal's Nepal Army and Department of Meteorology and Hydrology, with the funding support from the Global Environment Facility (GEF) constructed an outlet and drained over 4 million cubic meters of water from the lake.