Many of the missing are workers employed on power projects in Nepal built as part of a hydroelectricity boom in the Himalayan country. The death toll from flash floods along the Nepal-China border has risen to 633, with nearly 3,000 people still missing. Key points and original sources are listed below.

• Many of the missing are workers employed on power projects in Nepal built as part of a hydroelectricity boom in the Himalayan country.S1

• The death toll from flash floods along the Nepal-China border has risen to 633, with nearly 3,000 people still missing. The floods swept through communities along the Himalayan border on Wednesday after a glacier collapse triggered a surge of water, mud and de...S2