At least 472 people have been killed and more than 1,500 remain missing after devastating flash floods hit the Himalayan border between Nepal and China, where over 3,250 people have already been evacuated by helicopter. As rescuers race to find survivors, one of the biggest fears is that the death toll will continue to rise, with authorities also warning that an overflowing lake upstream could trigger more flooding. FRANCE 24's Navodita Kumari has the latest.