Severe monsoon flooding and landslides killed almost two dozen people in eastern Nepal on Saturday.
The death toll due to flooding and landslides across Nepal since Friday reached 49, officials said. He said rescue effects in flood and landslides-affected districts and places were hindered by adverse weather conditions.
The Ministry of Home Affairs, however, put the number of casualties at 17.
Thirty-six people have been reported missing, they added.
Local officials opened temporary shelters for displaced persons in schools and public buildings.
The Meteorological Forecasting Division has forecast moderate to heavy rains to continue across the country for the next few days.
In Saptari, around 1,000 houses have been inundated with water.
Almost 100 people died past year in Nepal during the rainy season, which typically begins in late June and lasts until the end of August.
Last weekend in the central lowlands, four girls from the same family drowned when they fell into a flooded roadside ditch. Biratnagar airport has been closed after flood water gushed into the airport area.
In the popular jungle safari resort of Sauraha in Chitwan, hotels were forced to shift their guests to higher floors as waters rushed into the premises.
Met department has predicted heavy rains in Terai and some other parts of Nepal.
Meanwhile, Nepal Cabinet held an emergency meeting during which Prime Minister Sher Bahadur Deuba ordered the local district administrations to intensify the rescue and release activities.
Biratnagar airport in the eastern district of Morang was closed after being submerged in a metre of water, authorities at the global terminal said.