Popular markets in both Tachileik in Myanmar and Mae Sai in Chiang Rai were inundated, with vendors rushing to move their goods to safety.
Chiang Rai Governor Narongsak Osotthanakorn instructed Mae Sai district chief Chutidej Meechan early Friday to get Disaster Prevention and Mitigation officials to Ban Sai Lomjoi village and the Sai Lomjoi Market community after homes there were deluged.
Floodwaters at the market were 30 centimetres deep.
The Army’s Pha Mueang Task Force based in Mae Sai also dispatched troops to help.