Heavy rains in Nepal triggered landslides and flash floods that killed at least 11 people in the last 36 hours and blocked key highways and roads, reported Reuters, quoted by BTA.
Eight people are missing, swept away by floods or buried by landslides, while another 12 people were injured and treated in hospitals, police spokesman Dan Bahadur Karki said.
"Rescuers are trying to clear the landslides and open the roads to traffic," Karki told Reuters, adding that heavy machinery was being used to clear them.
In southeastern Nepal, the Koshi River, which causes deadly floods in the eastern Indian state of Bihar almost every year, is above the danger level, a district official said.
"The flow of the Koshi is rising and we have asked residents to be alert for possible floods," said Bed Raj Phuyal, a senior official in the Sunsari district where the river flows. He added that as of 09:00 local time, the flow of water in Koshi was about 11,000 cubic meters per second, more than twice the normal rate.
Authorities said the levels of Narayani, Rapti and Mahakali in the western part of the country have also risen.
In hilly Kathmandu, several rivers burst their banks, flooding roads and inundating many houses.
Local media showed people wading through waist-deep water or residents using buckets to drain their homes.
At least 50 people in Nepal have died in landslides, floods and lightning strikes since mid-June, when the annual monsoon rains began, according to Reuters.