The National Water Resources Office is redrafting the national water master plan, with Bangkok as the priority and linked provinces Samut Prakan, Chachoengsao, Nakhon Nayok and Pathum Thani. Near-term focus is on emergency response drills, not new infrastructure. Irrigation Department projects (Chai Nat-Pa Sak, Bang Ban-Bang Sai, eastern drainage canals) are not finished: Bang Ban-Bang Sai is under construction, due around late 2029, and Chai Nat-Pa Sak has budget from early 2027. Watch for heavy rain in the south on 9-12 October 2026. For a Bangkok SME, this means flood-prone areas may see road and drainage works, but nothing here changes your plans this quarter beyond having a flood response plan ready.