All 50 districts of Bangkok declared disaster-affected: Thailand's flood warning explained
What happened
The Foreign, Commonwealth and Development Office updated its travel advice for Thailand on 28 September 2026 to add information about severe flooding. The advice says severe flooding is affecting parts of Thailand following heavy rainfall in a number of provinces, including Bangkok, Nonthaburi, Pathum Thani and Samut Prakan. All 50 districts of Bangkok have been declared disaster-affected areas. The Thai government has declared special public holidays on 28 and 29 September in Bangkok, Nonthaburi, Pathum Thani and Samut Prakan. The FCDO notes that many government offices and services may be closed or operating with reduced capacity as a result. Travel disruption is possible, including road closures and flooding of low-lying areas. The FCDO's advice to anyone planning to travel is to follow the advice of the local authorities. Importantly, the FCDO has not advised against travel to Thailand. This is an update to the warnings section of the advice, not a change to whether people should go.
Why this matters
Thailand is one of the most popular long-haul destinations for British travellers, and late September sits at the tail end of the monsoon season, when many people are booking or flying for autumn half-term. The detail that carries the most weight is the special public holidays. When a government declares emergency public holidays across a capital city and three surrounding provinces, it is telling people to stay off the roads. For a visitor, that means banks, government offices, some businesses and some services may simply not be open. That has knock-on effects that travellers do not always anticipate. If you need to replace a lost passport, sort out a visa matter, or deal with anything official, the offices may be shut. If you need a pharmacy or a doctor, services may be busier and harder to reach. Flooding also does not have to be dramatic to ruin a journey. Water across a low-lying road is enough to close an airport transfer route, strand a coach, or turn a two-hour drive into a six-hour one. Bangkok sits on a flat river delta only slightly above sea level, which is precisely why heavy rain spreads so widely there rather than draining away. There is one more reason to pay attention to FCDO updates specifically, and it is financial. Most UK travel insurance policies are written with reference to FCDO advice. Reading the advice before you travel is not box-ticking - it is part of what keeps your cover valid.
What the evidence actually says
It is worth being careful about what the FCDO advice does and does not say, because flooding stories tend to get louder as they travel. The FCDO has added information about flooding to the warnings and insurance section of its Thailand advice. It has not advised against all travel, or against all but essential travel, to Thailand or to any part of it. Those are specific, formal designations, and none of them has been applied here. The named provinces are Bangkok, Nonthaburi, Pathum Thani and Samut Prakan - the capital and the provinces around it. The advice says the flooding follows heavy rainfall in a number of provinces, so the picture may be wider, but those are the ones named. 'All 50 districts of Bangkok declared disaster-affected areas' is an administrative designation by the Thai authorities. It is a formal status that unlocks emergency powers and resources. It does not mean every street in all 50 districts is under water. The special public holidays are for 28 and 29 September - two days. Whether they are extended is a decision for the Thai authorities. The FCDO updates travel advice continuously, so the position on any given day may have moved since this was written. The advice page itself is the authoritative source, and it is free to read.
Qurexa perspective
The part of a disrupted trip that worries us most, given what we do, is medicines. If you take regular prescription medicines and your trip is extended by a few days - a cancelled flight, a closed road, a delayed transfer - the thing that runs out is your tablets. People plan for the hotel and the flights. Very few people pack spare medication. Our standing advice, which has nothing to do with buying anything from us, is simple: take at least a week more medication than the length of your trip, and split it between your hand luggage and your hold bag. If one bag goes missing, you still have the other. Carry a copy of your repeat prescription list or a printout from your GP practice showing the generic names of your medicines. Brand names differ between countries; generic names generally do not. If you need to see a pharmacist or doctor abroad, that list does most of the explaining for you. If you are travelling soon and your repeat prescription is due while you are away, order it early. Pharmacies cannot conjure a month's supply at short notice, and 'I'm flying on Friday' is not something a pharmacy can always fix on a Thursday afternoon. And check the rules. Some medicines that are entirely routine in the UK - including certain strong painkillers and some medicines for ADHD - are controlled or restricted in other countries, including Thailand. The FCDO country page and the Thai embassy are the places to check before you fly, not after you land.
Practical advice
If you are in Thailand now, or travelling there soon: Read the FCDO Thailand travel advice page before you go, and check it again shortly before you fly. It is updated as the situation changes. Follow the advice of local authorities. They have information about specific roads, districts and services that no overseas source will have as quickly. Contact your airline, hotel and tour operator directly to ask about disruption rather than assuming. Operators often have arrangements that are not publicised. Check your travel insurance now, before you need it. Look specifically for cover for travel disruption, cancellation, and extra accommodation costs if you are delayed. Check whether it covers natural disasters and flooding. Sign up for FCDO email alerts for Thailand. They are free and arrive when the advice changes. Do not walk or drive through floodwater. It hides open drains, sharp debris and live electrical hazards, and moving water is far stronger than it looks. It also carries contamination - waterborne infections are a real risk after urban flooding. Keep your passport, insurance documents and a list of emergency numbers somewhere dry and separate, and photograph them so you have a copy on your phone. If you develop a stomach upset or skin infection after contact with floodwater, get it seen rather than waiting until you get home.
What to know
The FCDO updated its Thailand travel advice on 28 September 2026 to warn of severe flooding after heavy rainfall, affecting provinces including Bangkok, Nonthaburi, Pathum Thani and Samut Prakan. All 50 districts of Bangkok have been declared disaster-affected areas, and special public holidays were declared for 28 and 29 September. Government offices and services may be closed or reduced, and road closures and flooding of low-lying areas are possible. The FCDO has not advised against travel to Thailand. Its advice is to follow local authorities. Check the FCDO page before you fly, check your insurance covers disruption, sign up for free FCDO alerts, and do not walk or drive through floodwater. If you take regular medicines, pack extra, split them between bags, carry a list of generic names, and check that nothing you take is restricted in Thailand. Sources: GOV.UK (Foreign, Commonwealth & Development Office), 'Thailand travel advice - Warnings and insurance', updated 28 September 2026, https://www.gov.uk/foreign-travel-advice/thailand/warnings-and-insurance; GOV.UK, 'Thailand travel advice', https://www.gov.uk/foreign-travel-advice/thailand; NHS, 'Travelling with medicines', https://www.nhs.uk/nhs-services/prescriptions/taking-medicines-abroad/. This article is for general information and does not replace advice from a doctor, pharmacist or other qualified healthcare professional.
Related articles
Twenty separate flare-ups: the French mosquito season nobody expected
France has had an unusual mosquito season, and the figures are now in. Santé publique France, the country's public health agency, published its enhanced survei…
Fever, rash and sore joints: a northern virus turns up in Germany
The European Centre for Disease Prevention and Control has reported something that had not happened before: Germany's first known case of symptomatic Sindbis vi…
259 of them in one county: the dengue you can catch in Florida
On 12 October 2026, the UK's National Travel Health Network and Centre – the service behind TravelHealthPro – added dengue in the United States to its outbreak…