Ayutthaya’s rivers rise as flood pressure shifts south
Water levels along the Chao Phraya and Noi rivers in Phra Nakhon Si Ayutthaya climbed by 10 centimetres by October 5, as predicted, pushing flooding into 53,457 households across 16 districts. The rise was triggered by sustained releases from Chao Phraya Dam, operating at 2,500 cubic metres per second, and combined inflows from Pa Sak Jolasid Dam and Rama VI Dam, which are now discharging at 500 and 675 cubic metres per second respectively. In Bang Ban district, residents in Ban Kum village reported water reaching the second floor of homes, forcing reliance on boats for travel and cutting off access to basic sanitation.
Authorities have placed Tha Ruea district under heightened monitoring, where rising water in the Pa Sak River threatens low-lying residential zones. While downstream communities in Nakhon Nayok and Pathum Thani show signs of stabilization, Ayutthaya remains a critical node in the flow path toward Bangkok.
Bangkok’s drainage gains momentum, but systems are stretched
Floodwater in Rom Klao and Lat Krabang fell by 50 centimetres after three days of continuous pumping, according to the Bangkok Metropolitan Administration (BMA). But 20–30 centimetres of standing water still lingers on major roads, making travel perilous. Recovery is being managed in four distinct zones, each assigned different teams from the BMA, Defence Ministry, and local agencies to coordinate debris removal, equipment deployment, and drainage.
A key bottleneck remains the Prawet Burirom Canal, where water cannot flow fast enough into the Chao Phraya River. The BMA deployed additional pumps and water-propulsion boats on October 3, targeting reductions of 25cm per day in the most flooded sectors. The system is expected to clear most residential areas within two more days.
Eastern reservoirs near capacity, with staged releases underway
Sixty-two major reservoirs across the eastern region now hold 2,605 million cubic metres of water — 100.23% of their normal combined capacity. At the centre of the crisis, Khlong Luang Ratchalothorn Reservoir in Chonburi has triggered controlled, staged outflows to safeguard dam integrity. Downstream communities in Phan Thong and Phanat Nikhom received early warnings to prepare for sudden rises in natural drainage channels.
Pumping stations are operating 24/7, and engineers are reinforcing earthen embankments while coordinating with provincial authorities to move water into secondary canals, including Khlong Saen Saep, which now has its sluice gate open 50cm wider than yesterday.
Over 850,000 households registered for aid — but delays persist
By October 4, 851,547 registrations had been processed through the Thang Rath app, with 371,775 from Bangkok alone — the highest in the country. The system uses official house IDs to prevent duplicates, and district offices are now helping elderly or mobility-limited residents complete applications in person.
Emergency aid includes:
• 88,600 baht for structural repairs to primary homes
• 13,500 baht for tools or equipment critical to livelihoods
• 5,000 baht for hospitalisations lasting three or more days
• 9,000 baht for homes submerged over seven days
A technical glitch caused duplicate text messages on October 3, but officials confirmed no data breach occurred. The system was paused at 10pm that day and restored once corrected.
Rain forecast intensifies pressure on Central and South
The Thai Meteorological Department warns heavy rain will return from October 8–13, affecting Central, Eastern, and Southern Thailand, particularly Bang Khun Thian (Bangkok), Phetchaburi, and Prachuap Khiri Khan. While upstream flow into the Chao Phraya is under control — and Bangkok’s flood barriers still have room to absorb 10–20cm more — saturated soil and nearly full canals mean even moderate rain could spark new flash floods.
Prime Minister Anutin Charnvirakul ordered accelerated damage assessments and faster disbursements, urging agencies to prioritize public health clean-up in areas where water recedes. He also confirmed that over 30 million households are covered under state disaster insurance for floods, windstorms, and earthquakes — a system that will activate automatically without household action.
Critical road closures remain
Motorists are advised to avoid these four flooded routes in Bangkok:
• Chao Khun Thahan Road
• Chalong Krung Road
• Luang Phaeng Road (near Lotus’s, Lat Krabang)
• The full length of Lat Krabang Road
With water still rising in Chachoengsao and Suphan Buri, and flood control structures under strain, recovery in central Thailand remains slow — and the next week’s rain will determine whether current efforts are enough.
