Nepal has issued a fresh flood alert as rescue teams race to locate thousands of missing people following devastating flash floods [1].
The disaster has crippled infrastructure and trapped hundreds in tunnels, highlighting the extreme vulnerability of the region to climate-driven water surges.
Rescue operations are currently concentrated across Nepal, with significant efforts focused on the Trishuli tunnel, the Rasuwa hydropower tunnel, and areas along the Bhotekoshi River [1, 2, 3]. The Nepal Army and Indian technical experts are assisting in the operations to reach those trapped [1, 2]. Approximately 1,000 people are believed to be trapped in tunnels [10].
Conflicting reports exist regarding the scale of the casualties. Some reports said the death toll has crossed 900 [1, 9], while the Nepal disaster agency and other sources said the figure is 788 [4, 6]. The number of missing persons also varies widely across reports, ranging from 1,300 [8] to more than 4,247 [2].
The floods were triggered by a combination of heavy rains and upstream glacier melt [2, 7]. Chinese authorities said water flow increased upstream, which contributed to the rising water levels in the Bhotekoshi River [2].
International efforts to assist those affected are ongoing. Authorities said 149 Indians have been evacuated from the affected areas [1].
Rescue workers continue to face challenges as water levels remain unpredictable. The combination of hydropower tunnel collapses and river overflows has created a complex rescue environment for the Nepal Army and their international partners [1, 2].
“Approximately 1,000 people are believed to be trapped in tunnels”
The discrepancy in casualty figures suggests a breakdown in communication and reporting during the chaos of the disaster. The involvement of glacier melt and upstream water flow from China indicates that Nepal's flood risks are increasingly tied to regional environmental factors and transboundary water management, making local preparedness insufficient against large-scale glacial lake outburst floods.
