Hundreds of people were killed and at least 2,500 others were injured in a difficult to reach mountainous region. Officials warned many more people may still be awaiting rescue.

© Sayed Hassib/Reuters

At least seven people have been killed in the flooding, which also swept away the main bridge connecting Nepal to China.

Unmanned aerial vehicles are playing an increasing role in transporting supplies, and even people.

As heavy rains battered southwestern China, drones were deployed to deliver relief supplies, disinfect flooded areas and airlift a trapped resident.