A typical scenario (an illustrative example, not real people)

Auntie Si and Uncle Choet have lived in a raised wooden house on a Bang Bo canal since they were young. They are used to the tides; water has visited the space under the house before and always gone away. Uncle Choet assumed this year would be the same.

This year it did more than visit. Days of heavy rain pushed the canal higher until the water rose past the open ground space and onto the wooden floor of the house itself. Everything stored underneath, sacks of rice, garden tools and an old fridge used for keeping fish, went under. Their daughter, who works at a factory off Bang Na-Trat Road, rode her motorbike through the water to help lift things, and their small grandson was sent to stay with relatives.

When the water dropped, the floorboards had a thin film of mud and a sour, musty smell. The space under the house became a pit of mud and debris. Auntie Si developed an itchy rash on her legs, and Uncle Choet, who has asthma, started coughing at night. Their daughter asked how to make the old wooden house safe again, especially before the grandson comes home.

Questions like this are being asked in every kind of Bang Bo home. The answer starts with understanding what the water left behind and recovering in the right order for your type of house.

Where Bang Bo Flooded: The Facts Available

This section draws only on news and official reports, and it is important to say plainly: there is no district-level figure for Bang Bo. The available numbers are province-wide.

• Thai PBS reported that Samut Prakan declared flood disaster zones in six districts: Mueang Samut Prakan, Bang Sao Thong, Bang Phli, Bang Bo, Phra Pradaeng and Phra Samut Chedi.
• According to the DDPM on 2 October 2026, 307,704 households across Samut Prakan were affected, and water levels were rising.
• This is a province-wide number with no Bang Bo breakdown, so it should not be used to estimate how many Bang Bo homes flooded.
• Nationally, the DDPM reported the same day that 31 provinces plus Bangkok were flooded, affecting 1,245,581 households and 3,535,206 people, caused by heavy to very heavy rain combined with runoff from the north.

Figures change daily, so Bang Bo residents should follow the district office, local administrative organisations and the DDPM closely. What the data does make clear is that, as of the report date, water in the province was still rising. Many Bang Bo homes may therefore still be in the coping stage rather than the recovery stage, which is why the advice below is split into before, during and after.

How Different Bang Bo Homes Are Affected

Bang Bo lies in the east of Samut Prakan. It is flat and low-lying, criss-crossed by canals, with old waterside communities, farmland such as fish and shrimp ponds and rice fields, and newer industry and housing along Bang Na-Trat Road. Part of the district also meets the Gulf of Thailand coast. That variety means recovery starts with identifying what kind of home you have.

1. Raised wooden houses on the canals

Raised houses are designed to live with water, but when it rises past the open ground floor and onto the house floor, the timber soaks up water and humidity. Gaps between floorboards trap mud and germs. The space underneath becomes a pit of mud, rubbish, plant debris and sometimes dead animals. Odour from below rises through the floor gaps into bedrooms. The key is to clean and dry underneath first, then deal with the floor above.

2. Timber shophouses in old market quarters

Canal-side market shophouses are usually a shop downstairs and a home upstairs. When water enters, stock, wooden shelving, chest freezers and sacks of goods go under together. Rows of joined shophouses ventilate poorly, so damp and odour drift from unit to unit. For food sellers, cleanliness before reopening is about customer safety, not just smell.

3. Estates and townhouses along Bang Na-Trat Road

These are like estate homes across Samut Prakan: gypsum walls, built-in cabinets, laminate or tile floors, low-mounted sockets. Check electrics first, strip out swollen materials, and watch for damp rising into upstairs bedrooms.

4. Rental rooms and workers' dormitories

Ground-floor rental rooms are often small, with few windows and mattresses on the floor. When water enters, bedding, clothes and personal belongings all get soaked. Tenants usually have to go straight back to work, with no time to dry the room properly, so it turns damp and moldy fast. Landlords with many rooms should plan recovery for the whole building systematically.

5. Homes among fish ponds and paddy fields

Farm homes often store fish feed, fertiliser, tools and pumps. When these mix with floodwater, the smell is heavier than usual, and storage sheds become rat shelters after the water drops, so leptospirosis risk needs extra attention.

Every Kind of Germ the Bang Bo Flood Can Carry

Floodwater in Bang Bo is a mixture of rain, canal water, drain and toilet water, water from aquaculture ponds and community waste, so it carries several groups of germs.

Bacteria: E. coli, Salmonella and Leptospira

E. coli comes from human and animal faeces. When floods overwhelm toilets, cesspits and waste pipes, it spreads with the water and stays in the mud. Eating with unwashed hands or using dishes that were underwater without disinfecting them can cause diarrhoea and cramps. Salmonella causes food poisoning with fever, vomiting and diarrhoea, and is found when food, meat or eggs touch dirty water, so market food stalls must be especially careful.

Leptospira, which causes leptospirosis, comes from the urine of rats and other animals in the water and enters through cuts or water-softened skin. People who wade to move belongings, help neighbours, tend ponds or clear the space under houses are at high risk. Symptoms include sudden high fever, headache, muscle pain, especially calf pain, and red eyes. If these appear within one to two weeks of wading, see a doctor and mention the flood.

Viruses: norovirus, rotavirus, RSV and influenza

Norovirus and rotavirus cause sudden vomiting and diarrhoea, spreading through faeces, surfaces and contaminated food, and pass easily in families crowded together or in temporary shelters. RSV and influenza spread more readily with crowding, poor sleep and damp air. Young children and older people are more likely to become seriously ill.

Mold on timber, in walls and in fabric

The CDC advises cleaning and drying within 24 to 48 hours after the water recedes to limit mold. In wooden homes it grows in board gaps, under floors and behind timber cabinets; in concrete homes, on gypsum, wallpaper and behind furniture; in rental rooms, on mattresses, pillows and clothes. Airborne spores aggravate asthma and allergies.

Musty, sewage and fishy odours

Homes near fish ponds, or where water carried feed and plant debris, often have fishy and rotten smells mixed with damp. These soak into timber, fabric and walls and return when the weather warms or the house is shut up, even after washing.

Who needs most care

Older people in canal-side homes, young children, pregnant women and people with asthma, diabetes, kidney disease or weak immunity. Anyone with fever, persistent diarrhoea, heavy vomiting, breathing difficulty or calf pain after wading must see a doctor immediately. Cleaning or ozone is not medical treatment.

The Impact on Bang Bo: Health, Livelihoods and Homes

Health: rashes from long hours in water, diarrhoea, asthma and allergy flare-ups from damp and mold, and leptospirosis risk for anyone who waded for days.

Livelihoods: market shops close, discard stock and clean before reopening; farmers tend ponds and fields; factory workers take leave or struggle to commute. Every day a home or shop is unusable is lost income.

Repair costs: floors, walls, cabinets, appliances, mattresses and stock. Doing things out of order, such as painting a damp wall or laying flooring over wet timber, means paying again when mold returns.

Rental rooms: landlords need rooms habitable quickly to keep tenants, and tenants need rooms that do not smell or make them ill.

Attachment to home: for families who have lived on the canal for generations, the house is memory as well as shelter, so making it safe again means more than an ordinary repair.

Why the Usual Approaches Fall Short in Bang Bo Homes

Letting timber dry on its own: waterlogged boards take a long time to dry properly, and mold and odour build up in the gaps meanwhile, especially if the ground underneath stays a damp mud pit.

Pouring bleach on wooden floors: it can stain and degrade timber, cannot reach into the wood, and its fumes irritate the airways in closed rooms, which is a particular problem for people with asthma.

Reopening the shop right after washing: if shelves, freezers and walls are still damp, a musty smell can keep customers away and new stock can go moldy.

Perfume or incense: it masks the smell briefly, does nothing to germs, and makes the air worse in poorly ventilated shophouses and rental rooms.

Reusing flooded mattresses: they absorb dirty water right into the core. Sun-drying may dry the surface, but the inside remains a source of germs. Throw them away.

Water Still Rising: What to Do Before, During and After the Flood in Bang Bo

Because the DDPM reported on 2 October 2026 that water in the province was still rising, Bang Bo homes may be at different stages. Follow the stage your home is in.

Before water enters

• Lift appliances, documents, medicines and dry food high.
• Move items from under raised wooden houses upstairs, or tie them down.
• Know where your breaker box is and be ready to switch off the ground floor.
• Market shops should raise stock and move food items out first.

During the flood

• Avoid wading unless necessary; if you must, wear boots and cover wounds.
• Never touch electrics while standing in water.
• Drink bottled water and do not eat food that touched floodwater.
• Watch for snakes and other animals seeking higher ground in the house.

After the water drops

• Have an electrician check the system before switching on.
• Remove mud, wash and dry; strip out rotten or swollen materials.
• Clean the space under wooden houses and let air flow through.
• Only once the home is dry, consider ozone disinfection.

Ozone Disinfection in Bang Bo With WHD: How and When

The residential and building ozone disinfection service from World Health Disinfection (WHD) uses ozone gas (O3) to break down the cell structures of viruses, bacteria and mold and to break apart odour molecules. It then reverts to oxygen (O2) with no chemical residue. As a gas it reaches into board gaps, behind shelving, under beds, into curtains and through the air, which suits wooden homes full of crevices and poorly ventilated shophouses.

According to test results certified for the company by Thailand's Department of Medical Sciences and Intertek (UK), WHD's ozone treatment eliminates 99.99% of viruses, bacteria and mold; see the certification documents. It must come after mud removal, washing and drying, and it does not replace cleaning, stripping out damaged materials or medical care.

How the service works

1. Describe your home by phone or LINE: wooden house, shophouse, estate home or rental rooms, how high the water came, plus photos.
2. Zone planning: for example the upper floor of a wooden house, the shop front and upstairs rooms of a shophouse, or several rental rooms in one building.
3. Preparation: home washed and dry; food, medicines and plants removed; windows and vents closed.
4. Everyone out: people, pets and plants leave. Treatment happens only in an empty, closed space.
5. Treatment: typically about 30 minutes per zone.
6. Rest and ventilation: re-enter only when the team says it is safe.

WHD is based in Bang Khae, Bangkok, with no branch in Bang Bo or Samut Prakan. Service in Bang Bo is arranged by phone at 065-556-6294 or LINE @whd268, and the team confirms travel and timing. Same-day arrival is not guaranteed, especially while some routes are still flooded.

For shops, warehouses or buildings larger than a home, see the WHD disinfection service and ozone cleaning service.

10 Reasons Bang Bo Homes and Shops Should Consider Ozone

1. Reaches board gaps and floor crevices in canal-side wooden homes that cloths cannot.
2. Suits poorly ventilated shophouses, where damp and odour circulate inside.
3. Treats fishy, rotten and musty odours at the source. See the WHD ozone service.
4. No chemical residue on timber floors, shop shelves or bedding.
5. Kinder for older people and asthma sufferers who should not breathe strong chemical fumes.
6. Company-certified testing shows 99.99% elimination of viruses, bacteria and mold.
7. Gets shops ready for customers in an odour-free space.
8. Landlords can plan a whole building room by room or floor by floor.
9. About 30 minutes per zone plus rest time. Read about ozone cleaning.
10. Free medical-grade disinfectant spray for jobs of 15,000 baht or more. Ask via the service page.

Example Case: A Grocery in a Timber Shophouse in Old Bang Bo Market

This example case is hypothetical, used to explain the recovery order. It is not a real customer review.

Muay runs a grocery in a two-storey timber shophouse handed down from her parents. The shop is downstairs; upstairs is where she and her mother, in her eighties, sleep. When water entered, almost all the downstairs stock, rice, sugar, snacks and household goods, went under, and the soft-drink freezer toppled into the water. Her mother went to stay with a grandchild.

When the water dropped, Muay threw away all food stock that had touched the water, even packs that looked sealed. An electrician checked the wiring and the freezer. She washed the floor and wooden shelves with clean water and detergent and opened the shop front and upstairs windows for several days. But a musty, fishy smell still lingered in the shop and drifted upstairs, because the joined shophouses barely ventilate.

She contacted WHD on LINE with photos of the shop and upstairs room. The team suggested two zones, the shop floor and the upstairs bedroom, on a day when the shelves were dry enough. Muay closed for half a day and left the building; the team treated each zone for about 30 minutes, then rested and ventilated before she went back in.

Only then did she restock. The smell had clearly reduced, regulars said the shop felt like itself again, and when her mother moved back upstairs she no longer complained about the smell. Muay's lesson: restocking before the shelves were dry and disinfected could have meant new stock going moldy and being lost again.

Before and After Ozone: A Checklist for Bang Bo Homes

Before ozone

• Electrics checked by an electrician.
• Mud removed from the house and from under wooden homes.
• Flooded food, medicines, mattresses and pillows thrown away.
• Rotten or swollen gypsum, laminate or boards stripped out.
• Washed with clean water and detergent and left to dry for several days.
• Shops cleared of stock on the shelves.

On ozone day

• All people, pets and plants out of the treated area.
• Cupboards, drawers and internal doors open so the gas can reach.
• Windows, outside doors and vents closed during treatment.
• Re-enter only when the team says so.

After ozone

• Keep ventilating.
• Repair and paint only once materials are truly dry.
• Watch for fever, calf pain, diarrhoea or breathing trouble and see a doctor if they appear.
• Keep following local water-level and rain announcements.

FAQ: Ozone Disinfection After the Bang Bo Flood

Q: Can a raised wooden house be treated?
A: Yes, in the parts that can be closed, such as upstairs bedrooms and halls. The open space underneath should be washed and dried by letting air through. The team will assess which areas can be sealed enough.

Q: The water is still rising. Should I book now?
A: You can contact the team to plan ahead, but treatment should happen after the water drops and the home is washed and dry.

Q: How long must a food shop close?
A: About 30 minutes per zone plus rest and ventilation time. The team will estimate based on floor area.

Q: Can several rental rooms be treated together?
A: Yes, the whole building can be planned, with all tenants in the treated zone leaving during treatment.

Q: Does WHD have a branch in Bang Bo?
A: No. WHD is based in Bang Khae, Bangkok. Travel and timing are confirmed by phone at 065-556-6294 or LINE @whd268. Same-day arrival is not guaranteed.

Q: Is there a figure for flooded homes in Bang Bo?
A: Not from the available data. The DDPM figure of 2 October 2026 is 307,704 households for all of Samut Prakan, with no district breakdown.

Q: I have a fever and calf pain after wading. What should I do?
A: See a doctor immediately and mention the floodwater; it may be leptospirosis. Ozone is not treatment.

Plan Ozone Disinfection for Your Bang Bo Home or Shop

Tell WHD what kind of home you have and how high the water came, with photos of the affected rooms. The team will plan zones and a suitable date once the home is washed and dry.

See WHD Ozone Disinfection

Phone 065-556-6294 · LINE @whd268 · worldhealthdisinfection@gmail.com

Related Links and References

• WHD residential and building ozone disinfection
• WHD disinfection service
• Ozone cleaning service
• Certification documents
• Thai PBS: Samut Prakan declares flood disaster zones in six districts (Thai)
• Bangkokbiznews: DDPM flood situation report (Thai)
• Khaosod English (29 Sep 2026): more than 2.6 million people affected by floods
• CDC: Floods and cleanup safety
• WHO fact sheets

Note: there is no district-level figure for Bang Bo. The figures cited are province-wide, from the DDPM on 2 October 2026, and change daily.