The number of people missing in Nepal has risen to more than 4,200, the national disaster agency said on Monday.
Authorities worked through the night at Nepal's hydropower sites where employees are thought to be trapped in tunnels.
On the Tibet side of the border, 546 people have been reported missing, according to Chinese state media. Fire rescue dogs have been used to help with the search.
Unpredictable weather on both sides of the border has made rescue efforts increasingly difficult, with continuous rainfall forecast for the next 24 hours.
