These people live in one of the most rugged landscapes in the world and were already vulnerable to heavy snow and floods. But the earthquake has totally cut off many people.
This is a makeshift helicopter landing pad marked out in the snow. It's very difficult for us to move in the valley. If you land in one place you could be stuck there for months.
Sometimes you can see people below but landing sites are not suitable. You have to make very hard choices about whether to set down.