KATHMANDU — The death toll from Nepal's flash floods rose above 400 on Saturday, with search teams hunting for 33 missing Britons amid warnings of further flooding in mountainous districts. The Nepalese Home Ministry confirmed the figures.

Intense monsoon rains and glacial melt triggered the floods, which have swept through river valleys and destroyed roads, bridges and homes across several districts. Hundreds of people remain injured or displaced, while helicopters ferry stranded trekkers and villagers to safety.

The United Kingdom has offered £5 million to support Nepal's relief effort, the Foreign, Commonwealth and Development Office said. Among the missing Britons is a nurse, and consular staff from the British Embassy in Kathmandu have been assisting families seeking information about relatives.

Nepal's Department of Hydrology and Meteorology warned of continued heavy rainfall over the weekend, raising fears of new landslides and river surges in already saturated regions. Aid agencies including the Nepal Red Cross Society said access to remote areas remained hampered by damaged infrastructure.

FCDO staff are working with Nepalese authorities and local partners to locate British nationals and provide support to affected families. The Nepalese government cautioned that the confirmed death toll was likely to climb as searches reached cut-off communities.