Trauma surgeons, inflatable hospitals and tonnes of medical supplies are on their way to Nepal. But the task rescue workers face is monumental.
As aid begins to reach Nepal's worst-affected areas, the response to the country's deadly earthquake is under intense scrutiny, writes the BBC's Mike Wooldridge.
Fake videos and false rumours have been circulating online after the earthquake in Nepal
As countries around the world send manpower and resources to Nepal, we look at how an earthquake search and rescue operation is carried out.
The BBC's Tom Martienssen was climbing Mount Everest when the earthquake struck and caused an huge avalanche that destroyed base camp beneath him.