The National Water Resources Office (Notice 1/2569) warns of heavy-to-very-heavy rain, flash floods, mudslides and river overflow from 29 Aug to 2 Sep 2569 (2026). Watch areas include upper north (Chiang Rai, Chiang Mai, Nan, Phayao, Mae Hong Son, Tak), upper Northeast (Nong Khai, Nakhon Phanom, Sakon Nakhon, Roi Et) and the east (Chanthaburi, Trat). If your premises, stock, delivery routes or farms are in these districts, move stock off low ground, check drainage and plan alternative transport. Reservoirs are at 64% of capacity nationally.