Rescue efforts are continuing in Nepal and Tibet after flash floods that have killed hundreds and left many more missing. But fears that a lake formed by the landslide could overflow and cause fresh flooding, along with difficulty accessing disaster-hit areas, are hindering rescue and recovery missions. Lucy Hough speaks with south Asia correspondent Hannah Ellis-Petersen, who is in Nepal, about the situation on the ground - watch on YouTube. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>