Nepal's border region with China has been devastated by deadly mudslides and flash floods, leaving at least 359 people dead and more than 900 missing. Experts believe a glacial collapse and debris flow triggered the disaster, while blocked rivers could unleash further waves of flooding. Xi Jinping has ordered an “all-out” rescue, with Chinese forces and specialist teams joining operations. Meanwhile, UK PM Andy Burnham has pledged £5 million in emergency aid as 33 Britons remain missing. With more rain forecast, can rescuers reach survivors before another deadly wave strikes?