The Thai Meteorological Department issued its final heavy-rain bulletin (No. 18) on 28 Sep 2026. Overall rainfall is falling, but red-alert provinces include Chiang Mai, Nakhon Sawan, Kanchanaburi, Ratchaburi, Chonburi, Rayong and Chanthaburi, and yellow-orange alerts cover Bangkok and its vicinity, Samut Sakhon, Ayutthaya and Phuket. Expect flash floods and water over low-lying areas for one more day. If your site, stock or delivery routes are in these provinces, protect goods and plan around road disruption. Small boats should stay in port until the sea warning lifts, as waves are 2-3 m or higher in the upper Gulf and Andaman.