The National Water Resources Office (สทนช.) issued Notice No. 3/2569 warning of flooding, flash floods, flash rivers and overbank flows from 9 to 13 September 2569 (2026). Risk areas include Chiang Mai, Chiang Rai, Nan, Phayao, Ubon Ratchathani, Nakhon Ratchasima, Chonburi, Rayong, and parts of Bangkok and its vicinity. Reservoirs over 80% full are being watched. If your shop, warehouse, stock or delivery routes are in these provinces, move stock off low floors, check drainage and pumps, and plan alternative transport for the week.