UPDATE — this extends our earlier coverage: Nepal Flood Toll Nearly Doubles Past 900 as Mass Burials Begin

The death toll from flooding on the Nepal-China border has passed 950, with rescuers racing to reach hundreds of workers believed trapped in tunnels at buried hydropower sites, according to France24.

Rescue efforts have since shifted from mass burials to the buried hydropower tunnels, France24 said.

Mud from the flooding buried hydropower sites, trapping an unknown number of workers, according to France24. Families of the missing were searching for loved ones, the broadcaster reported.

Hypothesis: the tunnel collapses could strain hydropower output on the Nepal-China border into the winter months, when electricity demand in the Himalayan region typically rises. Supporting this: the buried sites are hydropower facilities, per France24. Against this: the report does not identify which plants were hit or how much capacity is affected, so any supply impact is unconfirmed.

What to watch: confirmation of how many workers remain trapped, and whether Nepali or Chinese authorities disclose which hydropower plants were damaged and for how long.