The Mae Klong River basin has reached its most critical point. The National Water Resources Office (NWRO) has updated monitoring of four main rivers, expecting heavy rain to worsen areas still awaiting drainage. Water levels are predicted to normalize in 2 to 4 weeks.
Today's flood situation update (28 Sep 2026): Following flooding since 25 Sep 2026 with continuous rainfall and waterlogging in many areas of Bangkok and its vicinity, some residents remain confined. Relevant agencies are rapidly distributing survival kits to affected people, and the Department of Disaster Prevention and Mitigation has issued alerts to inform the public.
Thairath Online's special report consulted Thanaroj Warutprasert, Director of the National Water Command Center, National Water Resources Office (NWRO) and its deputy spokesperson, who said that as of 28 Sep 2026, the Mae Klong basin in Kanchanaburi province is the most critical due to inflows accumulating at Mae Klong Dam possibly exceeding 1,500 cubic meters per second, a record high. This will impact nearby areas as water flows downstream to Ratchaburi and Samut Songkhram provinces, which will also be affected.
Relevant agencies are monitoring and assessing the situation, issuing warnings to local officials to prepare and mitigate impacts. Water releases from Vajiralongkorn Dam are being reduced and the dam closed today (28 Sep 2026), which may raise reservoir levels to overflow. Officials are closely watching to gradually release water, marking the most concerning point.
Currently, rainfall is increasing over Uthai Thani and Kamphaeng Phet provinces, raising water volume which may exceed 2,000 cubic meters per second. Overnight on 27 Sep 2026, rainfall added about 300 cubic meters per second. Prime Minister Anutin and Deputy Prime Minister, chairing the Central Flood and Drought Prevention Committee, have ordered water management on both western and eastern sides to divert water into harvested fields and low-lying areas to cap flows at 2,000 cubic meters per second and lessen downstream impact.
The greatest current risk is further accumulated rainfall. The Meteorological Department and NWRO predict that western regions of the country—from Kanchanaburi up to Mae Hong Son—remain at risk of substantial additional heavy rain.
Thanaroj said if no further rain occurs, the focus will shift to water discharge, as accumulated floodwaters from upstream must pass through downstream areas to the sea. This causes high water volumes in lower areas that require about 2 to 4 weeks to drain.
The Mae Klong basin still has high upstream water volumes flowing through Samut Sakhon, causing widespread flooding in the area.
The Chao Phraya River flow at Nakhon Sawan station is 1,904 cubic meters per second, and at Chao Phraya Dam in Chainat province, the outflow is 1,950 cubic meters per second. These levels are expected to remain steady, resulting in prolonged water discharge.
For the Bang Pakong River, the Marine Department reports water levels at Bang Pakong station (Tha Kham subdistrict, Bang Pakong district) have risen to 3.65–4.09 meters during flood and high tide periods. Floodwaters threaten to inundate about three districts north of the dam—Bang Nam Priao, Khlong Khuean, and Bang Khla in Chachoengsao province—which are low-lying and most vulnerable. Relevant agencies have coordinated to prepare and issue warnings.
The Tha Chin River is currently at critical levels with continuously rising water due to heavy accumulated rainfall, upstream flood inflows, and high tides. Several areas are affected, such as Mueang district in Suphanburi province, where water height reaches 6.37 meters—critical and near key road levels. Main water stations are also at critical levels, exceeding banks: station T.15 Bang Sai Pa in Bang Len district at 1.97 meters, 17 cm above bank; station T.1 Nakhon Chai Si district at 1.71 meters, 21 cm above bank; and station T.14 Sam Phran district at 1.54 meters, 4 cm above bank.