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Bangkok flash flooding eases as front moves to Myanmar but Governor warns city needs 2-3 days to recover

The Thai capital races to drain vast floodwater after 300mm of rain. All 50 districts are disaster zones, 31 major roads remain hit and Chadchart… Read More ›

thaiexaminerJames Morris and Son Nguyen查看原文 ↗

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随着锋面移至缅甸,曼谷的突发性洪水有所缓解,但曼谷市长警告称,该市需要2-3天才能恢复。

September 27, 2026 at 12:20 pm

by James Morris and Son Nguyen

in Living , Media , Politics , Thailand

Bangkok was still fighting a major flood emergency on Sunday after more than 300mm of rain swamped the capital. All 50 districts remain disaster areas, with 31 major roads still hit by standing water. Governor Chadchart Sittipunt singled out Lat Krabang, Nong Chok and Min Buri as the critical danger zones. Pumps ran through the night as crews raced to force vast volumes of trapped water towards the Chao Phraya River. Meanwhile, GISTDA’s Check Water system logged a staggering 28.25 million requests in one day as residents tracked the crisis online. The main weather system has now shifted towards Myanmar, offering Bangkok a crucial break. Yet Sunday still carries an 80% thunderstorm risk, while the accumulated water could take another two to three days to clear.

Bangkok Governor Chadchart Sittipunt warns floodwater may take 2–3 days to clear after 300mm of rain left all 50 districts disaster areas, with 31 major roads flooded. (Source: Daily News)

Bangkok remained under severe flood pressure on Sunday after extraordinary rainfall overwhelmed roads, canals and drainage systems across the capital.

However, the immediate weather threat was beginning to ease. Bangkok Governor Chadchart Sittipunt said the main weather system had moved west towards Myanmar. Rainfall over Bangkok should therefore decline. Yet vast quantities of water remained trapped across the city, particularly in eastern districts.

Lat Krabang, Nong Chok and Min Buri were the three areas causing the greatest immediate concern. In response, Bangkok Metropolitan Administration teams were pushing water through the city’s heavily loaded canal network. Water was moving through the Saen Saep and Prawet Burirom systems towards the Chao Phraya River. At the same time, emergency teams continued helping residents stranded inside flooded communities.

Chadchart leads Bangkok flood response as 300mm of rain swamps eastern districts and strains drainage

Governor Chadchart returned to the streets early on Sunday to oversee the operation. At about 7.30 am, he travelled by motorcycle taxi to City Hall in Din Daeng. Shortly afterwards, he met directors from all 50 Bangkok districts and relevant BMA agencies at 8 am. He confirmed that Lat Krabang, Ramkhamhaeng and Bang Kapi remained badly affected. Nonetheless, eastern Bangkok remained the central focus of drainage operations.

The scale of the rainfall was exceptional. Accumulated rainfall exceeded 300mm in parts of Bangkok after September 24. Reports covering that period estimated approximately 223 million cubic metres of accumulated rainwater across the capital. Separately, earlier BMA calculations covered a shorter period. Those calculations put nearly 300mm over 48 hours at roughly 30 million cubic metres.

By early Saturday, Min Buri had already recorded 274.5mm. Nearby Khlong Sam Wa had received 273mm before further rainfall followed. As a result, drains, canals and pumping stations were forced to handle enormous volumes simultaneously. Water consequently accumulated across roads, communities and low-lying areas.

Against that backdrop, officials declared all 50 Bangkok districts disaster areas. Crucially, the declaration does not mean every location across the 50 districts was flooded. Rather, it provides the BMA with the legal and administrative framework for emergency operations. It also allows emergency spending, assistance and compensation measures across the capital.

Thirty-one major Bangkok roads remain flooded as stranded vehicles struggle through deep standing water

Road conditions remained serious into Sunday morning. At 10.31 am, the BMA warned motorists about significant standing water on 31 principal roads. Affected routes included Ram Inthra, Phahon Yothin, Theparak, Watcharaphon and Chaeng Watthana. Nawamin, Prasert-Manukitch, Ramkhamhaeng and Vibhavadi Rangsit were also affected. Notably, some monitoring locations were still reporting water depths of 20cm or more.

The disruption followed another difficult night across Bangkok’s road network. On Saturday evening, Ratchada-Lat Phrao intersection remained heavily flooded despite continuous drainage operations.

Numerous cars and motorcycles became stranded while attempting to cross the inundated area. Consequently, motorists and members of the public helped push broken-down vehicles towards the roadside.

Even light additional rainfall caused problems because substantial water already covered the road. Smaller vehicles, in particular, struggled to negotiate flooded sections. In parallel, BMA teams accelerated pumping around the intersection as rainfall temporarily eased elsewhere. Some areas began improving during sustained breaks in the rain. Even so, significant standing water persisted elsewhere.

Bangkok pumps run through the night as 28.25 million flood information requests hit GISTDA system

Drainage operations continued throughout Saturday night and into Sunday. Pumps were working against accumulated rainfall exceeding 300mm since September 24. The BMA was attempting to clear water before another major downpour arrived. At this stage, already heavily loaded drainage routes left little capacity for another intense rainfall event.

The flood emergency also produced a huge surge in demand for digital information. Millions of requests hit systems covering flooding, rainfall, water levels, roads and traffic. One government system alone recorded more than 28 million requests during September 25.

The Geo-Informatics and Space Technology Development Agency operates the Check Water service. That system recorded 28,252,239 requests on September 25 as flooding intensified. Usage rose sharply as people checked inundated areas, water conditions and travel risks. Importantly, however, the figure does not represent 28.25 million individual users.

Instead, the number measures requests made to the system. One person repeatedly checking changing conditions can therefore generate numerous requests. There is currently no confirmed figure for unique users across Thailand’s combined flood-information systems. Nevertheless, the GISTDA number demonstrates the extraordinary volume of digital activity generated by the emergency.

Satellite, weather and traffic systems give Bangkok residents real-time information during flood crisis

Check Water represents only one part of the information network now available. The GISTDA service uses satellite data to identify flooded locations. Elsewhere, government and private systems cover dams, rainfall, canals, rivers, roads, traffic and weather forecasts. Together, those services allow people to assess changing conditions before travelling.

ThaiWater, also known as One Map Water, provides nationwide information on water conditions. The system monitors dam levels, drainage and water levels at monitoring stations. As part of this, users can assess water movement and downstream conditions. Google Flood Hub provides another service forecasting potential flooding across important areas and river basins.

On another front, weather monitoring has become critical while Bangkok waits for further rainfall. The Thai Meteorological Department provides rainfall information through its radar network. Residents can follow conditions through its website and Thai Weather application. Additionally, Windy provides information covering rainfall movement, weather conditions and wind direction.

Motorists have separate tools for assessing roads before travelling. The Department of Highways provides information about major roads and identified flood points. Meanwhile, Longdo Traffic reports congestion and traffic slowdowns. The BMA also operates traffic cameras across Bangkok. Accordingly, motorists can inspect individual routes before entering heavily affected areas.

BMA flood systems and emergency hotlines provide Bangkok residents with water, road and rescue updates

More detailed BMA systems provide information specifically for Bangkok residents. One service displays current rainfall measurements across the capital. Another identifies flooded roads and affected locations. A third shows water levels and flow rates inside Bangkok’s canal network. Collectively, the systems provide a detailed picture of conditions across the city.

There is an important limitation. Information across the different services is not necessarily updated simultaneously. For that reason, official guidance also directs residents towards continuing announcements as conditions change. Emergency telephone services remain available alongside the online systems.

The Department of Disaster Prevention and Mitigation operates 1784 for assistance and evacuation requests. For medical emergencies, the National Institute for Emergency Medical Services operates 1669. The Department of Highways provides its 1586 hotline. Similarly, the Department of Rural Roads handles route inquiries through 1146.

Electricity emergencies are covered separately. The Provincial Electricity Authority operates 1129 outside the metropolitan electricity area. By comparison, the Metropolitan Electricity Authority operates 1130 across Bangkok, Nonthaburi and Samut Prakan. Those channels remain available while flood and drainage operations continue.

Bangkok faces 80% thunderstorm risk on Sunday as Chadchart says drainage could take two to three days

Attention is now shifting towards the time required to remove Bangkok’s accumulated water. The immediate meteorological picture has improved because the main weather system is moving away. Governor Chadchart said it had shifted west towards Myanmar. Accordingly, the rainfall threat over Bangkok should weaken.

Sunday nevertheless remained a high-risk day. The Thai Meteorological Department gave Bangkok and surrounding provinces an 80% probability of thunderstorms. Heavy rain also remained possible in some locations. Moreover, the department warned about accumulated rainfall, flash flooding and standing water in low-lying areas.

Another substantial downpour could quickly slow drainage operations. It could also replenish water across roads and already heavily loaded canals. This risk is greatest where accumulated water has not yet drained. Thus, additional rainfall on Sunday remained a crucial factor in Bangkok’s immediate outlook.

The broader forecast becomes more favourable from Monday, September 28. The Thai Meteorological Department said the intense low-pressure system was moving away. Rainfall should consequently begin decreasing from Monday. Heavy rain could still occur elsewhere in Thailand.

For Bangkok, the improving forecast is critical because its drainage network needs time. Governor Chadchart previously estimated accumulated water could require roughly two to three days to clear. That calculation, however, depends on Bangkok avoiding another major volume of rainfall.

Eastern Bangkok remains under drainage pressure as local rainfall, not northern runoff, drives flooding

The capital is therefore entering a different phase of the same emergency. Extreme rainfall created the initial flooding. Now, Bangkok must remove enormous volumes already sitting inside communities, roads, drains and canals. The speed of that operation will determine how quickly normal conditions return.

Eastern Bangkok remains the most difficult part of the drainage operation. Lat Krabang, Nong Chok and Min Buri remain the principal areas of concern. Beyond those districts, other eastern areas continue to face heavy drainage pressure. BMA teams are using canals to push accumulated water towards larger waterways.

Road conditions will depend heavily on how quickly pumps and canals lower those water levels. Without major additional rainfall, the drainage network should gradually gain ground. Conversely, another intense downpour could rapidly add to the accumulated volume.

The nature of the current emergency is also significant. Exceptional local rainfall and drainage pressure are driving the immediate flooding. Governor Chadchart has said the northern water threat to Bangkok remains manageable. Accordingly, this differs from flooding driven principally by massive northern runoff entering the capital.

Bangkok pumps race against further rain as 31 major roads and all 50 districts remain under pressure

Instead, huge quantities of rain fell directly across Bangkok within a compressed period. That volume overwhelmed roads, drains, canals and pumping infrastructure. Saturday showed how quickly those pressures could disrupt transport. Cars and motorcycles stalled while heavily flooded roads became difficult for smaller vehicles.

Conditions improved where rainfall stopped for sustained periods. In contrast, substantial standing water persisted across other locations. Pumping therefore continued throughout the night. The race was to lower water levels before further heavy rainfall arrived.

The BMA’s immediate challenge is straightforward but formidable. Bangkok must remove accumulated water faster than new rainfall replaces it. Sunday’s 80% thunderstorm forecast leaves that operation exposed to further disruption. Still, the main weather system’s movement towards Myanmar has improved the wider outlook.

If rainfall remains limited, pumps and canals should gain valuable time. Water levels could then progressively fall through Monday and Tuesday. Much therefore depends on whether Bangkok receives another large downpour before existing water escapes.

For now, all 50 districts remain covered by Bangkok’s disaster declaration. Furthermore, 31 principal roads were still reporting significant standing water on Sunday morning. Eastern Bangkok remained under the greatest pressure while pumping and drainage operations continued at full capacity.

Millions turn to online flood systems as Bangkok races to clear water before another major downpour

At the same time, the emergency has moved increasingly online. Residents are checking satellite imagery, rain radar, traffic cameras, roads and canal measurements before travelling. GISTDA’s Check Water service alone handled 28,252,239 requests on September 25.

That total cannot be converted into a number of individual users. Nor is there a combined unique-user figure covering all available flood-information systems. Even so, the volume provides a striking measurement of public demand for immediate information.

The crucial period now runs through Sunday and into Monday. Another major downpour could add water faster than Bangkok’s drainage network removes it. Alternatively, sustained lighter rainfall would allow pumping stations and canals to attack the accumulated water.

For the first time since the crisis intensified, the main weather system is moving away from Bangkok. Yet its massive water load remains. Pumps are still running, canals remain heavily loaded and dozens of major roads are affected.

Above all, Lat Krabang, Nong Chok and Min Buri remain at the centre of the emergency. Bangkok now needs sufficient drainage time to clear the vast accumulation left since September 24.

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James Morris is a pename for an international writer based in Bangkok who works on various international news media. He is a sub editor with the Thai Examiner news website since it began in 2015. Son Nguyen is an international writer and news commentator specialising in Thai news and current affairs. He commenced working with the Thai Examiner News Desk in May 2018.

All posts by James Morris and Son Nguyen

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