Nepal's confirmed flood death toll has climbed past 900, nearly double the more-than-500 figure reported last week, as mass burials began Monday for victims of the flash floods that struck the Nepal-Tibet border region, according to France 24. That earlier toll had come as troops pulled roughly 100 survivors from a flooded tunnel.

More than 4,000 people remain missing across the remote Himalayan region, Nepali and Chinese officials said, including hundreds of workers from hydropower plants swept up in the flooding, per France 24.

The jump in confirmed deaths within a week shows how difficult it has been to reach and count victims in a border zone cut off by landslides and washed-out roads. That gap between the missing and the confirmed dead means the toll could still climb sharply.

Hypothesis: the concentration of missing among hydropower workers suggests Nepal's dam build-out in the Himalayas has placed large, fixed workforces in flood-prone gorges. Supporting: hundreds of the missing are hydropower plant staff, per France 24. Against: the source material doesn't identify which plants were struck or how they were sited relative to the flood path — the causal link is unproven, an open question for follow-up reporting.

Why it matters: a joint Nepal-China search across a shared border tests cross-border disaster coordination. What to watch: whether the missing count falls as access improves, and whether either government publishes a joint damage or casualty assessment for the hydropower sites.