KOKHONG, Laos—The first warning came at 4.00 p.m., one hour later the water started to flow through the village, and by late evening it was a torrent.

A girl uses a mattress as a raft during the flood after the Xepian-Xe Nam Noy hydropower dam collapsed in Attapeu province, Laos July 26, 2018. Reuters/Soe Zeya Tun
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