Why a newly formed lake is sparking fears of more flooding along the Nepal-China border

BENGALURU, India (AP) — As rescue workers dealt with the aftermath of a devastating flash flood along the Nepal-China border, officials issued a warning that a newly formed, overflowing lake could lead to further flooding. Rescuers were working through mud and debris on Friday, Friday, as authorities cautioned that the situation was highly concerning.

Nepal's disaster management authority stated that the lake had been formed due to a blockage upstream, causing water levels to rise rapidly. Satellite images from China’s state broadcaster, CCTV, suggested that the lake was located near the same area where a glacial detachment event occurred on Wednesday, triggering the catastrophic flooding downstream. The lake's barrier was reportedly more than 10 kilometers from Gyirong Port, a border crossing with Nepal that was submerged in mud and floodwater.

Climate scientists have noted that the glacial collapse on Wednesday had led to several small water bodies forming as debris littered the region. One of these newly formed lakes, created by an ice-rock avalanche on August 26th, is holding a significant volume of water - equivalent to around 1,200 Olympic-sized swimming pools. This swelling lake sits in a narrow valley with limited space for the water to disperse, raising fears of another disastrous flood.

Jakob Steiner, a geoscientist at the University of Graz in Austria, emphasized the need to take the authorities' warnings seriously. He explained that ongoing glacial melting due to high temperatures compound the risk, as the river carries a substantial amount of debris and rocks. While both experts agreed that a repeat of the Wednesday's flash flood was unlikely, they stressed the importance of remaining vigilant and precautionary measures to prevent any further loss of life.