A typical scenario (an illustrative example, not a verified customer review)

1 a.m., and the sound of water in Grandpa Sompong's ground-floor bedroom

In a detached house on a Rangsit-area housing estate in Prachathipat, Fon had moved her eighty-year-old father's bedroom downstairs the year before, because his knees could no longer manage the stairs. On the night of 24 September the rain did not stop for hours. Everyone went to bed as usual; nobody expected the water to come so fast.

At around one in the morning Grandpa Sompong woke to the sound of water lapping at the bed legs. He switched on the light and saw cloudy water flowing under the door and across the floor, his slippers floating beside the bed. Fon had to help him upstairs one step at a time in the dark after the power was cut, while her husband grabbed whatever he could lift. The mattress, the medicine cabinet, the wheelchair, the sofa and the kitchen cupboards were already under water. Most things were on the floor because nobody had time to prepare.

When the water finally went down days later, the bedroom wall had a tide line, the laminate floor had swollen and buckled, the curtains had black spots, and a smell of damp and drains was so strong that Fon kept the door shut. She wanted her father back in his own room quickly, because climbing stairs every day risked a fall. But she worried whether an eighty-year-old with chronic lung disease could safely sleep in a room that had just been flooded. Many families in Prachathipat now face the same question.

Where Prachathipat flooded: the reported facts

The following comes only from news reports. The situation and figures change daily, so keep following notices from Pathum Thani province, Thanyaburi district and your municipality or local authority.

• Bangkok Biz News, 26 September 2026: the Pathum Thani governor declared an emergency disaster zone covering 90 communities in Thanyaburi district, in Prachathipat subdistrict.
• Flooding began at about 01:00 on 25 September 2026.
• The causes were continuous heavy rain and overflow from Khlong Rangsit Prayoonsak.
• Communities named include the Decha Phatthana community and housing estates in the Rangsit area.
• Nationally, the DDPM reported on 2 October 2026 flooding in 31 provinces plus Bangkok, affecting 1,245,581 households and 3,535,206 people. The cited report gives no household counts or water depths per community in Prachathipat, so this article includes none.

An emergency disaster declaration matters in practice. It provides the basis for state agencies to help and for affected residents to apply for assistance under the regulations. Residents should keep evidence of damage, such as photographs taken before cleaning, and follow the procedures their local authority announces.

Ninety communities in Prachathipat do not share one problem

Prachathipat sits in Rangsit, which is both an old canal-side town and a fast-growing suburb. The 90 communities in the declaration therefore include very different kinds of housing, each needing a different recovery.

Housing estates with detached houses and townhomes

Estate homes often use laminate or tiled floors, some lightweight partition walls, particle-board built-in cabinets and several air-conditioners. Soaked, these materials swell, hold water and hide mold. Many homes have an elderly relative's bedroom on the ground floor, and when water arrives in the middle of the night, those rooms suffer most.

Established communities such as Decha Phatthana

Older communities tend to mix timber houses, half-timber half-masonry houses and single-storey concrete homes close together, with narrow lanes and older drainage. Timber that soaks up water takes a long time to dry and grows mold easily. Neighbours pulling together to carry and wash is a real strength in communities like these.

Shophouses, stores and dormitories around Rangsit

Rangsit has plenty of shophouses, shops and dormitories. Ground floors used as shops or storage often flood completely and need fast recovery so people can get back to earning.

Community buildings

Community halls, estate management offices, clubhouses, childcare centres and local shops are used by many people. If they still hold mold and musty odour, the problem spreads to every household.

Every germ the Prachathipat floodwater brought in, room by room

The WHO, the US CDC and Thailand's Department of Disease Control all warn that floodwater carries several groups of organisms: bacteria, viruses and fungi. Walking through the house room by room shows where each group hides and how to deal with it.

The ground-floor bedroom: mold and respiratory viruses

Soaked mattresses, pillows, blankets and curtains are ideal for mold, which can start growing within about 24-48 hours of materials getting wet. Spores in a bedroom are breathed in all night, worsening allergies, asthma and chronic lung disease. RSV and influenza spread more easily when the whole family sleeps together in one upstairs room during a flood.

The kitchen: bacteria that cause gut illness

Submerged cupboards, counters, chopping boards, utensils and fridges may be contaminated with E. coli and Salmonella from sewage-laden water, causing diarrhoea, stomach pain and vomiting. Food that touched floodwater should all be discarded, even if the packaging looks sealed, unless it is a can whose outside can be washed and disinfected.

Bathrooms and drains: gut viruses and sewer smells

When an estate's pipes and treatment tanks are submerged, wastewater can back up through bathroom and kitchen floor drains. Norovirus and rotavirus, which cause vomiting and diarrhoea, spread via those surfaces. Young children are most at risk of dehydration.

Carports, lawns and front paths: leptospirosis

Mud left in carports, lawns and paths may contain Leptospira from rat and animal urine. It enters through wounds or skin soaked for a long time. Anyone shovelling mud or washing the yard should wear boots and rubber gloves. High fever, headache or calf pain within two to three weeks of contact with floodwater means seeing a doctor straight away.

Living room and upholstered furniture: the smell that will not leave

Fabric sofas, rugs and cushions soak up water and odour into the foam. Musty and drain smells keep evaporating out every day, even once the floor is clean. Soaked items that cannot be washed should be thrown away; for what stays, the air and hard-to-reach surfaces still need treating.

Air-conditioners: the forgotten spot

An air-conditioner in a damp, flooded room can draw spores and odour into its filter and coil. Before switching it on, have a technician clean and check it, especially low-mounted units or compressors that sit on the ground and may have been submerged.

Who needs extra care

• Older adults, particularly those sleeping downstairs with lung, heart disease or diabetes.
• Young children, who crawl, touch the floor and put hands in their mouths.
• Pregnant women, who should avoid shovelling mud and scrubbing mold.
• Bedridden patients and people with weakened immunity.
• Community volunteers who wade for days helping neighbours.

Recovering the whole of Prachathipat: when one clean house is not enough

With 90 communities flooded at once, effective recovery has to work at household and community level. A clean house with a mud-choked drain outside, or a musty community hall down the road, can still send germs and smells back.

Coordinate with estate management or community leaders. Many estates have a juristic person responsible for roads, drains and common areas. Scheduling drain clearing and de-silting for the whole lane on the same day means the water each household washes out can actually flow away.

Prioritise shared buildings. Childcare centres, halls used for handing out supplies and rooms used by older residents should be washed, dried and disinfected first, because vulnerable people gather there.

Organise flood waste. Hundreds of mattresses, sofas and pieces of furniture discarded at once can sit at the roadside for days. Wet piles like these breed odour and rats, so coordinate collection points and pick-up days with the local authority.

Share health information. The estate's LINE group is a good channel for reminders about leptospirosis symptoms, drinking clean water and taking older people to a doctor when something seems wrong.

Things many Rangsit households do that slow recovery

Laying new laminate over a damp floor. Swollen laminate has to come up so the concrete beneath can dry. Covering it traps moisture and mold under the new floor.

Running the air-conditioner straight away to pull out damp. If the unit has not been cleaned or the electrics checked, you risk a short circuit and circulating mold spores through the house.

Mixing cleaners to make them stronger. Bleach mixed with bathroom cleaners or ammonia produces toxic gas, which is especially dangerous in a home with elderly people.

Keeping an elderly person's new mattress. A mattress soaked in floodwater harbours mold and bacteria that are very hard to remove completely, particularly for someone with lung disease.

Spraying air freshener instead of fixing the cause. The scent fades in hours and the drain and musty smells come back.

Moving an older relative back too soon. Stairs are hard, but a room that is still damp and untreated may be the bigger risk. Find a dry, safe temporary sleeping place first.

How ozone works for homes in Prachathipat

Ozone (O3) is a strongly oxidising gas. Used in a closed, unoccupied room, it reaches everywhere, including behind built-in cabinets, under beds, into curtain folds and through the whole volume of air. It breaks down the structures of viruses, bacteria and mold, breaks apart the molecules behind musty and drain odours, and then reverts to oxygen (O2), leaving no chemical residue in an elderly person's bedroom or a child's room.

According to test results certified for the company by the Department of Medical Sciences and Intertek (UK), World Health Disinfection's ozone service eliminates viruses, bacteria and mold by 99.99%. Details are on the certification page.

Service steps

1. Information. House size, number of rooms, which rooms flooded and which are used by older people or young children.
2. Readiness check. Confirm that mud is out, surfaces washed, damaged items discarded and the house dried.
3. Everyone out. All people, pets and plants leave; doors and windows closed.
4. Zone-by-zone treatment. Ozone is released and given contact time, typically about 30 minutes per zone.
5. Rest and ventilation. Ozone reverts to oxygen and the house is aired before anyone returns.

Safety first: ozone is used only in an empty, sealed space with no people, pets or plants. Bedridden patients must be moved elsewhere during treatment, and everyone returns only after the rest and ventilation period. Ozone comes after washing and drying; it does not replace cleaning or medical treatment.

10 reasons Prachathipat homes should consider ozone after the flood

1. Ground-floor bedrooms of older people were hit hard. Disinfecting the air helps families use those rooms again with more confidence once dry.
2. The water came at night, so a lot was submerged. Rooms still full of belongings need a method that reaches gaps a cloth misses.
3. Built-in cabinets and partition walls in estate homes have voids gas reaches better than wiping. See the ozone disinfection service.
4. Drain smells from the estate's treatment system are broken down rather than masked.
5. No residue, suiting patient rooms, children's rooms and rooms with medical equipment after ventilation.
6. Tested to 99.99%, according to test results certified for the company by the Department of Medical Sciences and Intertek.
7. Works for shared buildings such as community halls, clubhouses, estate offices and childcare centres.
8. About 30 minutes per zone, so families can usually return the same day after ventilation.
9. Helps limit returning mold while the rainy season continues, when done after the house is dry. Talk to the WHD team.
10. Better value for a whole house. Jobs of 15,000 baht or more include a free medical-grade disinfectant spray. Ask about the promotion.

Before and after: a detached house on a Rangsit estate

Example case: an estate clubhouse and its small health room in Prachathipat

An illustrative example of a common situation, not a verified customer review.

Wit manages the juristic person of a housing estate in the Rangsit area. The estate clubhouse has a meeting room, a gym and a small room used weekly for blood-pressure checks for older residents. When the water came at 1 a.m., the clubhouse ground floor flooded completely. Afterwards Wit needed it as a donation drop-off point and meeting place, but it smelled strongly musty, and several residents with allergies said they sneezed as soon as they walked in.

Wit organised housekeepers and volunteers to remove wet carpets, sofa cushions and boxes of soaked documents, wash floors and walls, and air the building for several days. He had the electrics checked and the air-conditioners cleaned, then called the WHD team to plan ozone in zones: the meeting room, the gym and the health room. During treatment the clubhouse was closed, signed "no entry," and empty.

After the rest and ventilation period, residents at the next meeting said the musty smell that had set them sneezing was much reduced. Wit reported to the estate committee with before-and-after photos and used the LINE group to encourage residents to follow the same order at home. Restoring a shared building helped the whole community get back to normal faster.

Recovery checklist for Prachathipat, Thanyaburi

Be ready if heavy rain returns

• Put an older or sick person's bed where they can get to higher ground quickly, with a torch beside it.
• Raise sockets and valuables, and keep a bag of medicines and documents within reach.
• Follow provincial notices and your community LINE group, especially at night.

In the first 24-48 hours after the water drops

• Photograph damage in every room as evidence for assistance under the disaster declaration.
• Have an electrician check the system and a technician check air-conditioners before use.
• Wear boots and rubber gloves while shovelling mud.
• Throw out mattresses, food and soaked items that cannot be washed.
• Lift swollen laminate or plywood so the floor beneath can dry.
• Open doors and windows; use a dehumidifier if you have one.

Before ozone day

• Check that walls and floors are dry.
• Arrange temporary stays for older people, patients, children and pets; move plants out.
• Tell the team which rooms smell worst and which are used by vulnerable people.

After ozone

• Return only after the rest and ventilation period the team specifies.
• Open windows for extra airing and wipe food-contact surfaces with clean water.
• Watch everyone's health. High fever, calf pain, severe diarrhoea, breathing difficulty, or an older person becoming drowsy means a doctor's visit straight away.

Planning service in Prachathipat, Thanyaburi

World Health Disinfection is based in Bang Khae, Bangkok 10160, with no branch in Pathum Thani. Residents, estate managers and community leaders in Prachathipat can call 065-556-6294 or message LINE @whd268 with the size of the property and number of rooms. The team confirms travel, coverage and appointment dates case by case. Demand is high after floods, so same-day arrival cannot be guaranteed.

The service covers houses, townhomes, condominiums, dormitories, hotels, offices, factories, schools and hospitals, as well as estate common buildings. Related services: ozone for chemical residue removal and disinfection services.

FAQ: ozone after the Prachathipat flood

1. What should be done in a flooded elderly person's bedroom before ozone?

Discard the soaked mattress and fabrics, remove mud, wash floors and walls, lift swollen materials and let the room dry. Then treat with ozone and return only after ventilation. If the older person has any unusual symptoms, see a doctor first.

2. Can a bedridden patient stay at home during treatment?

No. The treated area must be empty. Move the patient elsewhere first and bring them back after ventilation is complete.

3. Can an estate's juristic person book treatment for common buildings?

Yes. The service covers clubhouses, offices, meeting rooms and other shared buildings; the team assesses the number of zones from the floor area.

4. Can ozone replace cleaning the air-conditioner?

No. Air-conditioners in flooded rooms should be cleaned and checked by a technician first. Ozone treats the room's air and surfaces after cleaning.

5. How long does it take?

Typically about 30 minutes per zone, excluding preparation and ventilation.

6. Is there a branch in Thanyaburi or Rangsit?

No. The team is in Bangkok; contact them by phone or LINE to confirm travel and dates.

7. I spent days helping neighbours shovel mud and now have a fever. What should I do?

See a doctor immediately and mention floodwater and mud exposure. High fever, headache and calf pain can be leptospirosis. Ozone is not a medical treatment.

Make your Prachathipat home safe again for the whole family

Wash, dry, then let the WHD team plan ozone for your home and your community's shared buildings.

See the Ozone Disinfection Service

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

Related links and references

• Residential and building ozone disinfection
• Ozone cleaning service
• Contact us
• Bangkok Biz News, Pathum Thani flood coverage: bangkokbiznews.com/news/news-update/1253703
• Bangkok Biz News DDPM summary: bangkokbiznews.com/news/news-update/1254629
• Khaosod English, 29 Sep 2026: More than 2.6 million people affected by floods
• CDC floods guidance: cdc.gov/floods

Note: flood areas and times are cited from news reports on the dates given. The situation changes daily.