A low pressure system made landfall in the central province of Quang Binh on Thursday, bringing torrential rains to Vietnam, measuring 400-500mm.

The Guardian: Vietnam floods: deaths reported, tens of thousands of homes destroyed. Authorities mobilize army and police to rescue trapped residents in central Vietnam following torrential rain. Officials warned the region could be hammered again if typhoon Sarika in the South China Sea reaches Vietnam.

• On Friday afternoon, about 1,200 houses were submerged under 0.8 to 2.5 meters of water, according to the authorities. http://en.cand.com.vn/Law-Society/Province-drowns-as-non-stop-rains-floods-hit-central-Vietnam-412663/
• 2016 Vietnam floods https://en.wikipedia.org/wiki/2016_Vietnam_floods