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The flood warning system at Imja glacial lake has not been maintained since 2016, fearful locals tell BBC.
Watch LiveBritish Broadcasting CorporationHomeNewsSportBusinessTechnologyHealthCultureArtsTravelEarthAudioVideoLiveDocumentariesHomeNewsUS & CanadaUKUK PoliticsEnglandN. IrelandN. Ireland PoliticsScotlandScotland PoliticsWalesWales PoliticsAfricaAsiaChinaIndiaAustraliaEuropeLatin AmericaMiddle EastIn PicturesBBC InDepthBBC VerifySportBusinessWorld of BusinessTechnology of BusinessNYSE Opening BellTechnologyWatch DocumentariesArtificial IntelligenceIntelligence RevolutionAI v the MindTech NowHealthWatch DocumentariesCultureWatch DocumentariesFilm & TVMusicArt & DesignStyleBooksEntertainment NewsArtsWatch DocumentariesArts in MotionTravelWatch DocumentariesDestinationsAfricaAntarcticaAsiaAustralia and PacificCaribbean & BermudaCentral AmericaEuropeMiddle EastNorth AmericaSouth AmericaWorld’s TableCulture & ExperiencesAdventuresThe SpeciaListEarthWatch DocumentariesScienceNatural WondersClimate SolutionsSustainable BusinessGreen LivingAudioPodcast CategoriesRadioAudio FAQsVideoWatch DocumentariesBBC MaestroDiscover the WorldLiveLive NewsLive SportDocumentariesHomeNewsSportBusinessTechnologyHealthCultureArtsTravelEarthAudioVideoLiveDocumentariesWeatherNewslettersWatch LiveThousands at risk after multi-million dollar Everest flood warning system left to rust11 hours agoShareSaveAdd as preferred on GoogleNavin Singh KhadkaEnvironment correspondentWatch: Drone footage shows glacial lake Imja near Mount EverestAn early flood warning system designed to save the lives of thousands of people in the Everest region may no longer be working, Nepalese officials have admitted to the BBC, after it was allowed to fall into a state of disrepair.
The disclosure came after villagers in the local Sherpa communities told the BBC no inspection of the UN-supported project had been carried out for many years after the dangerous Imja glacial lake was last drained in 2016.
Since then, no maintenance has been undertaken, which means siren towers have been left to rust, while some have even had their batteries stolen, according to locals.
On top of this, the satellite data reception transmitting the lake's water level - which can then be used to send out mobile phone alerts to locals - has been unreliable, officials at Nepal's department of hydrology and meteorology (DHM) told the BBC.
The Imja lake, which sits at a little over 5,000m (16,400ft) above sea level, has not burst since it was drained a decade ago - at which point, it was almost 150m deep in places.
Back then, the depth of the lake was reduced by about 3.5m as part of a $3.5m risk reduction project, which included the early warning system.
But scientists warn global warming-induced fast melting glaciers are causing many Himalayan glacial lakes to expand dangerously - meaning they can then burst out and sweep away downstream settlements, trekking routes and bridges.
Ice loss rates have doubled in the Hindu Khush Himalaya region since 2000, according to a recent assessment by the Kathmandu-based International Centre for Integrated Mountain Development.
Experts say rising temperatures have also left mountains less stable, unleashing rockfalls and glacial collapse - sometimes triggering catastrophic floods.
In the Everest region alone, there have been at least five floods from glacial lakes in the last five decades, leaving those living in Imja lake's path fearing for the future.
"Going by the state of the siren towers, we don't expect to get any flood w
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