The flash flood and landslide hit the Nepal-China border on WednesdayPolice in Nepal say 270 bodies have been foundHundreds of tourists are among nearly 1500 missing people Five Kiwis are among the missing, MFAT says It's believed a glacier collapse may have caused the disasterFive New Zealanders are among nearly 1500 people missing following Wednesday's catastrophic flash flooding on the Nepal-China border which killed at least 270 people.The identities of four of the five New Zealanders have been released - they were Suhasini Reddy, who was living in Australia, Auckland man Dejan Kuzmic and Hamilton couple Mihir and Kinnari Patel.The identity of the fifth person has not yet been confirmed.Reddy's brother Rajeev Reddy told RNZ she and the group of hikers she was with were due to meet Chinese authorities to get permission to cross the border close to the time the raging flood hit.Her appointment was at 11am local time, the tragedy unfolded shortly after 8.30am. He hoped she'd made it to higher ground.Suhasini Reddy is one of the New Zealanders missing.SUPPLIEDEarlier on Thursday, the Ministry of Foreign Affairs and Trade (MFAT) confirmed five New Zealanders were missing."Consular officials are providing support to the families of those individuals."Consular staff were deploying to Nepal, where they would join the efforts of the High Commission in India and Honourary Consul in Nepal.A spokesperson said the sheer scale of devastation was becoming increasingly clear and the loss of life in Nepal and China was likely to be horrific.The aftermath.SuppliedAnyone concerned for loved ones should contact MFAT's Emergency Consular Line on +64 99 20 20 20.Hundreds of foreign tourists are among those missing following the deadly flash flood.Nations including India, Australia, the UK, Canada, Germany, Japan, Malaysia, Russia, Singapore, South Africa, South Korea, Ukraine and the US also had citizens missing.The flash flooding was believed to have been caused by the collapse of a glacier which sent water crashing through the valleys of the border.Are you or is someone you know affected? Email iwitness@rnz.co.nzCCTV widely shared online showed the moment a wall of water crashed through the Rasuwagadhi border point in the Himalayan mountain range.People could be seen desperately running away from the scene before the water appeared.According to state media, the area still faced the risk of further landslides, mudslides and flash floods, with three days of rain ahead.The clean up in Nepal.SuppliedHow New Zealand reactedDr Tom Robinson, who studied and modelled landslides at the school of earth and environment at the University of Canterbury, said the landslide and flooding were not isolated events.He said he couldn't state climate change was the reason behind this specific avalanche, but there was a pattern in which the Himalayas were being destabilised by rising temperatures.Prime Minister Christopher Luxon described the images coming out of Nepal and China as "heartbreaking" and said New Zealand was in touch with Nepal authorities about New Zealanders who may be affected."My deep condolences to those affected and to impacted communities," he wrote in a post on X.Foreign Minister Winston Peters echoed his sentiments, saying New Zealand is "deeply concerned".Hamilton couple Mihir and Kinnari Patel are missing.The son of Sir Edmund Hillary described the flash flood as "catastrophic" in an interview with The Panel.Peter Hilary, who serves as chairperson of the Himalayan Trust, said the mountainous areas of Nepal had a history of glacial outburst floods (GLOFs)."Because of the great altitude that it originated from, probably 4500 metres, and then descending very rapidly down a gorge, these things tend to be absolutely catastrophic and that's of course what we've seen," he said.Hillary said a similar disaster wiped out a school his father helped develop back in the 1960s.The Himalayan Trust was fundraising in a bid to support the Nepalese government's emergency fund.A candlelight vigil would be held by the New Zealand Nepal Society for the victims in Aotea Square, Auckland, at 4pm on Saturday.See how the day unfolded below: