The Mae Klong dam is raising releases to 2,000 cubic metres per second from 13:00 on 29 Sep 2026, and may increase to 3,000. PDPM tells residents along the river, its branches and low-lying areas in Mueang Samut Songkhram, Amphawa and Bang Khonthi to prepare to evacuate. If you run a shop or workshop there: move vehicles and stock to higher ground, cut power to low-level outlets, and keep the 1784 hotline ready. Alerts come by Cell Broadcast from AIS, True and NT.