A multi-million-dollar early flood warning system set up to protect thousands living in Nepal’s Everest region has reportedly fallen into disrepair, raising serious concerns over the safety of vulnerable mountain communities and tourists as climate change intensifies threats from glacial lake outburst floods.
Officials from Nepal’s Department of Hydrology and Meteorology (DHM) have acknowledged that the warning system around the Imja glacial lake may no longer be functioning reliably, with maintenance neglected for years after the lake was partially drained in 2016 under a $3.5 million risk reduction initiative supported by the United Nations.
The project had aimed to lower the danger posed by Imja lake, situated more than 5,000 metres above sea level, by reducing its water level and establishing an early warning mechanism. This included siren towers installed in downstream villages and a satellite-linked hydrological monitoring system intended to issue mobile alerts in case of rising water levels or a flood emergency.
However, villagers in Sherpa settlements downstream of the lake have alleged that no regular inspections have taken place since the project was completed. Residents say siren towers have rusted, some are leaning dangerously, and batteries in certain installations have even been stolen. Locals fear the warning infrastructure would fail in the event of a disaster.
Communities in the Khumbu region, where at least six villages are considered vulnerable, say repeated appeals for repair and upkeep have gone unanswered. Residents of Chhukung, expected to be among the first settlements affected in case of an Imja lake outburst, have voiced concern over the lack of government presence and follow-up despite assurances that annual inspections would be conducted.
Officials have also admitted to technical problems with the hydrological monitoring station meant to relay real-time lake level data to Kathmandu. According to the DHM, unreliable satellite data reception has hindered the system’s ability to issue mobile phone alerts, further weakening preparedness in the region.
The concerns come amid growing warnings from scientists over rapidly expanding Himalayan glacial lakes due to global warming. Fast-melting glaciers have increased risks of glacial lake outburst floods, which can unleash devastating torrents capable of sweeping away villages, trekking routes and infrastructure downstream.
Recent assessments have shown ice loss rates in the Hindu Kush Himalayan region have doubled since 2000. Experts have also linked rising temperatures to increased mountain instability, triggering rockfalls, glacier collapses and sudden flood events.
The Everest region itself has witnessed at least five glacial lake flood incidents in the past five decades, reinforcing fears among residents who live in the shadow of Imja lake. Beyond local populations, concerns also extend to tourism, with more than 60,000 trekkers, climbers and visitors arriving in the region annually, many of whom travel through flood-prone areas during peak spring season.
Government officials have cited budgetary constraints for the neglect. Senior DHM officials reportedly said no dedicated government funding had been allocated for maintaining the warning system, while proposals to involve downstream hydropower operators in sharing maintenance costs have yet to materialise.
Authorities have admitted they cannot confirm whether the sirens remain operational. At the same time, officials said resources had recently been diverted to strengthen warning systems at another glacial lake, though attention would now return to Imja. Plans are also reportedly being considered to improve regulations and ensure staff and resources for field maintenance in remote mountain locations.
Even as concerns mount over Imja, Nepal has secured a fresh $36 million grant through the United Nations Development Programme to undertake similar risk reduction work at four other glacial lakes. Officials say lessons learned from Imja will help improve long-term sustainability of those projects, including dedicated financing and stronger institutional arrangements.
For many in the Everest region, however, the assurances offer little comfort. Locals say the failure to maintain a system created to protect them has left communities living with uncertainty and fear, especially as climate-driven threats continue to grow. With warning infrastructure reportedly compromised and environmental risks rising, residents say they remain exposed to a disaster they were once promised they would be protected from.
