Officials in Nepal say the death toll from the April 25 earthquake has jumped to more than 3,200 people.
Officials said on April 27 that more than 6,500 had been injured.
A powerful aftershock on April 26 triggered more avalanches in the Himalayas.
Relief agencies and officials said most hospitals were overflowing and short on medical supplies.
United Nations officials were concerned about thunderstorms that could threaten the many people staying outdoors and about a shortage of vaccines that could invite disease.
Landslides hindered rescue teams that tried to use mountain trails to reach those in need.
Neighboring countries sent in military transport planes laden with medical supplies, food, and water.
The earthquake was the worst to hit the South Asian nation in more than 80 years.
It destroyed swaths of the oldest neighborhoods of Kathmandu and was strong enough to be felt all across parts of India, Bangladesh, China's Tibet region, and Pakistan.
Based on reporting by AP and Reuters