Risk of Lake Burst Decreases at China-Nepal Border Disaster Site

The threat of a catastrophic lake burst at the site of a recent disaster along the China-Nepal border has significantly diminished, according to Chinese authorities. The lake, which formed following a massive glacial collapse earlier this week, has been slowly draining, reducing the risk of a sudden and devastating overflow.

Satellite imagery taken between Thursday and Saturday morning indicates that the lake, which straddles the China-Nepal border at the confluence of two rivers, has shrunk by approximately 21,000 square meters, down to about 99,000 square meters in size. This reduction is roughly equivalent to the area of 14 football fields combined, state broadcaster CCTV reported, citing the Water Resources Ministry.

The glacial collapse on Wednesday unleashed a powerful torrent of rock, ice, mud, and debris through the Himalayan mountain river systems, sweeping away a border port complex that connected China's Tibet Autonomous Region with Nepal. The disaster has killed hundreds and left thousands missing.

Experts and authorities had warned of a high risk of secondary disasters in the valley, particularly from the lake formed by the glacier debris. Such an overflow could have endangered rescue operations downstream. However, the recent reduction in the lake's size has alleviated some of these concerns.

State-owned engineering and rescue enterprise China Anneng has been closely monitoring the lake since Thursday. The company dispatched a 15-member team on Friday, equipped with reconnaissance drones, portable satellite stations, and mobile surveillance cameras, to gather more data about the lake's conditions.

On Friday, an overflow from the lake temporarily halted rescue work. However, further assessments determined that the risks were manageable. Authorities have also flagged another larger body of water at the bottom of the glacier collapse, estimating its area to be over 120,000 square meters, but its depth remains unknown.

Flood risks will persist until both lakes have fully drained, according to an official with Nepal's Disaster Management Authority. In the meantime, more than 50 rescue workers have been combing through the grey rubble of boulders and mud in search of signs of life and calling out to any survivors.

The first team of rescuers and a search-and-rescue dog reached the location of the Gyirong border crossing complex on Friday afternoon, which they described as having been reduced to ruins. The dangerous conditions at the main disaster zone, made more complex by the cutoff of roads and communication, continue to pose significant challenges to the Chinese relief efforts, according to state news agency Xinhua.

China's death toll from the disaster rose to seven early Saturday, with 554 still missing. Nearly 500 villagers and construction workers, as well as all 555 tourists from the area, have been evacuated.

The reduction in the lake's size is a welcome development for the rescue and relief efforts, allowing for a safer environment for those searching for survivors and for the assessment of the overall damage. However, the situation remains critical, and authorities are closely monitoring the situation to ensure the safety of all involved.