Bangkok authorities declared a flood disaster across all 50 districts of the Thai capital on Saturday, September 26, 2026, after nearly 48 hours of continuous heavy rain left canals overflowing, major roads submerged, and residents wading through deep water.
Nearly 300 mm (about 12 inches) of rain fell in parts of the city since Thursday afternoon, overwhelming Bangkok’s canal network and drainage systems. The eastern areas and neighborhoods near canals were hit hardest. Floodwaters entered homes, shops, restaurants, and alleyways; at least 13 roads were reported flooded, with some cars partially submerged and traffic disrupted.
Bangkok Governor Chadchart Sittipunt urged residents to stay home, move belongings to higher ground (especially those living near canals), and avoid unnecessary travel. He noted that “the canals are full” and that authorities were coordinating with nearby provinces to divert water. By mid- afternoon Saturday he said the situation had “stabilised,” estimating 2- 3 days to drain the water if no further heavy rain falls.
Prime Minister Anutin Charnvirakul cut short a trip to London to return and handle the crisis.
Temporary shelters and field kitchens were set up (including at schools); around 980 people were in shelters and dozens of bedridden residents were moved to hospitals. The army and Bangkok Metropolitan Administration are assisting. Free parking was offered at some MRT stations.
People described waist- or knee- high water. One vendor near a canal north of central Bangkok said, “The water keeps coming in… It’s like at my waist level now.” Some residents filled sandbags to protect homes and businesses.
Suvarnabhumi Airport was operating normally, though extra travel time was advised.
Bangkok, built on former marshland roughly 1.5 metres above sea level and sometimes called the “Venice of the East,” is particularly vulnerable. September is peak rainy season, and rainfall this year has been heavier than usual. The disaster declaration enables faster official response and assistance. More thunderstorms and rain were forecast over the weekend.
This follows earlier limited declarations for a few eastern districts on Friday. Broader flooding has also affected other parts of Thailand.
Thailand has a tropical monsoon climate. The main rainy (southwest monsoon) season normally runs from mid- May to mid- October, with the heaviest rains usually in August- September.
What you’re seeing in Bangkok right now is classic late- monsoon weather, intensified:
- Almost continuous heavy rain since Thursday (24 September) has dumped nearly 300 mm in parts of the city in ~48 hours.
- Bangkok’s canals (khlongs) are full, drainage systems are overwhelmed, and many roads (especially in the east and near canals) are flooded.
- This is why the entire city was declared a disaster zone on 26 September.
September is typically the peak or late- peak of the monsoon, so flooding is not unusual, but the intensity and duration this week have been higher than normal in the capital.
Quick monsoon overview for Bangkok
| Period | Typical conditions | Flood risk |
|---|---|---|
| May- June | Start of rains, often afternoon storms | Moderate |
| July- August | Steady rain, increasing rainfall totals | High |
| September | Peak / late peak, heaviest rain possible | Very high |
| Mid- to- late October | Monsoon weakens, rains decrease | Decreasing |
| November- April | Cool & dry season (northeast monsoon) | Low |
Bottom line: The current flooding is driven by the late monsoon rains. More thunderstorms and rain are still possible over the weekend, so conditions may stay difficult for another 1- 3 days even after the heaviest rain stops, while the water drains.
If you’re in Bangkok or travelling there, stick to higher- ground routes, allow extra time, and check real- time flood and traffic updates before moving around.
As of 26 September 2026, flooding or flooded roads have been reported in many parts of Bangkok. Areas that are particularly affected or require extra caution include:
- Ekkamai / Sukhumvit 63
- Ramkhamhaeng
- Vibhavadi Road / Chatuchak area
- Chaeng Watthana / Lak Si
- Lat Krabang
- Sena Nikhom
- Phong Phet / Ngam Wong Wan area
- and several other spots across the city.
Water is currently on the roads at numerous locations. Some streets have temporarily been classified as impassable for smaller vehicles.
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