Though floods are common in Nepal during the rains, the levels of inundation this year have been higher than usual. With the rainfall finally beginning to ease, Mr. Kfanal expressed hope that the flooding would recede. For now, the authorities were doing the best they could, he said.

Neighboring countries, particularly India but also Bangladesh and Myanmar, have also been affected.

Mohamad Farukh, the chief executive of Rapid Response, a nongovernmental charity focusing on disaster relief, said that at least 25 people had died so far in India, adding that this number could increase significantly in the coming days.