A typical scenario (an illustrative situation drawn from common experience, not a review from any specific customer)

A three-week-old baby, a house in Bueng Kum just out of the water, and a mother afraid to open the nursery door

Prae had given birth to her first daughter less than a month earlier. The two-storey townhouse in a quiet soi in Bueng Kum was the home she and her husband had spent months preparing. There was a white wooden crib in the corner, a small wardrobe of neatly folded cloth diapers, and a bottle steriliser sitting next to the kettle in the ground-floor kitchen. Everything had been arranged with care.

Then, in the last week of September 2026, the rain did not stop. According to news reports, roughly 300 mm fell in about 48 hours, and on 26 September the Bangkok Metropolitan Administration declared all 50 districts a disaster zone. Eastern Bangkok was hit hardest, and Bueng Kum and Khlong Chan appeared in the news again and again. Water seeped into Prae's house in the middle of the night. By morning the whole ground floor was under murky brown water.

The family waded out to a relative's car and went to stay at her mother's condo in a dry part of the city. News reports quoted Governor Chadchart as saying the canals were full and that drainage would take two to three days after the rain stopped. Even on 30 September, some roads, such as Si Burapha and Lat Phrao, still had 20 to 40 cm of standing water.

When the soi drained, her husband went back first. He sent photos of a mud line across the downstairs walls, a soaked sofa and swollen kitchen cabinets, then a short message: "Went upstairs. Strong musty smell. The baby's room too." The water never reached the second floor, but days of standing water below in a house shut tight had made the air heavy and damp. The nursery curtains had started to smell, and nobody could say what was inside the crib mattress.

Every night, feeding her daughter, Prae asked herself one question: when will home be safe enough for the baby? This article is for parents in the same position: why newborns are more vulnerable, the right order for recovering a flooded home, and where ozone disinfection fits as the final step.

Why a newborn is the most vulnerable person in a flooded home

A newborn is not a small adult. In the first three months, a baby's body is still adjusting to the outside world. The immune system is immature and relies partly on protection passed on from the mother. The airways are small, narrow and easily irritated. Babies also breathe faster than adults, so relative to body weight they take in more air each day. If the air in a room carries mold spores, dust from dried mud or droplets containing bacteria, the baby receives a larger share of it than anyone else in the house.

Babies also spend almost all day lying on mattresses, mats and blankets, faces close to the surface, unable to move away from a stuffy corner. Later, hands and objects go straight into the mouth.

Mold and airborne spores: the invisible risk in the nursery

After a flood, humidity inside a home rises sharply, even in rooms the water never touched. International health bodies such as the CDC and WHO advise cleaning and drying a home within 24 to 48 hours to limit mold growth. In the reality of this Bangkok flood, many families could not get back into their homes until water had stood for several days. That gave mold time to grow on gypsum walls, ceiling boards, curtains, wooden cabinets and the undersides of mattresses.

Mold releases tiny spores that float in the air. In a baby, spores and the substances mold releases can irritate the airways and bring on a runny nose, coughing or noisy breathing, and paediatricians generally advise avoiding mold exposure in the first year. A musty nursery is a sign that mold or moisture is building up somewhere.

Bacteria carried in with floodwater and mud

Floodwater in a big city is not clean rainwater. It has flowed through drains, septic tanks, rubbish bins and canals, and it carries germs from faeces, including bacteria that cause diarrhoea, into the house along with the mud. When the water recedes, those germs remain on floors, door frames, table legs and anything that was submerged. If parents walk from the ground floor up to the nursery without changing shoes or washing hands, germs can reach the crib without anyone noticing.

Diarrhoea is a particular concern for babies, because small bodies lose fluid very quickly. Signs that mean a baby should see a doctor right away include: fever in a baby under three months old, feeding less or refusing to feed, unusual sleepiness or floppiness, far fewer wet diapers than usual, repeated vomiting, frequent watery stools, fast or laboured breathing, or a bluish colour. These need medical care. Cleaning the house will not fix them.

Respiratory viruses in a busy house

During recovery, relatives, electricians and neighbours come and go. Tired, wet helpers catch colds more easily and may leave infectious droplets behind. Viruses such as RSV can make young babies seriously ill, so limit who enters the nursery, ask everyone to wash their hands, and get surfaces and air clean before the baby returns.

New mothers are at risk too

Many families forget that a mother who has just given birth is still recovering. She may be exhausted, and she may have a caesarean or perineal wound that has not fully healed. Wading through floodwater, shovelling mud or lifting heavy things raises the risk of wound infection and injury. If any adult who waded through floodwater develops high fever, headache or muscle pain, especially in the calves, this can be a sign of leptospirosis, so they should see a doctor and mention that they were in floodwater. Heavy cleaning should be done by other healthy family members, and the mother should stay with the baby somewhere safe until the house is ready.

What parents actually face: more than a mud line on the wall

The health of baby and mother

Every sneeze, runny nose or restless night after coming home makes parents wonder whether the room is to blame. That worry drains energy from a family that is already waking every two to three hours for feeds. A mother who ends up cleaning the house herself risks both infection and accumulated exhaustion.

Costs that keep growing

Many baby items are soft materials that soak up moisture: mattresses, cushions, fabric bassinets, carriers, soft toys and foam play mats. Most items that sat in floodwater should be replaced, and if mold returns because the room was not handled properly, new items can be damaged again. One Thai business report cited a Chamber of Commerce estimate of about 12,300 million baht in damage from this flood, so many households are paying for repairs at once.

Why familiar fixes are not enough for a baby's room

Splashing strong bleach everywhere. Bleach disinfects washed hard surfaces, but its fumes are not for a baby to breathe, it cannot reach mold inside gypsum or mattresses, and mixing it with ammonia or acid cleaners releases dangerous gases.

Running fans or air conditioning alone. Fans do speed up drying. But in a room where mold is already growing, moving air spreads spores everywhere. An air conditioner that sat in a damp house for days may have mold in its coil and ducts, so have a technician clean and check it before switching it on.

Painting over mold stains. If the wall is still damp inside, mold will bubble the new paint within weeks, and fresh-paint smell is one more thing a nursery does not need.

Washing fabrics and using them straight away. Some fabrics can be washed hot and sun-dried and then reused. Mattresses, cushions and anything with a foam core that sat in floodwater cannot be truly cleaned by washing and should be discarded. Washable items should be clean, completely dry and free of any musty smell before they go anywhere near the baby.

Assuming the upstairs room is fine because the water never reached it. This is the step many families miss. Moisture from the flooded ground floor rises up stairwells and through gaps in the house. An upstairs room left closed for days can become humid enough for mold to start on curtains, wardrobes and the backs of furniture. A nursery that never flooded still needs attention.

Several of these are part of a good recovery. What they lack is a step that treats air and surfaces of the whole room together without leaving residue.

WHD ozone disinfection: the finishing step before your baby comes home

World Health Disinfection (WHD) provides residential and building ozone disinfection for houses, condos and other buildings in Bangkok and the surrounding provinces. Ozone (O3) is a strongly oxidising gas. Released into a sealed room, it spreads into corners that cloths and sprays cannot reach, such as behind wardrobes, under cribs, along ceiling joints and through the air of the whole room. It breaks down the cell structures of viruses, bacteria and mold, as well as the molecules that cause musty odours. Afterwards, ozone reverts to oxygen (O2), so it leaves no chemical residue on surfaces or belongings.

According to the test results certified by the company, with testing by Thailand's Department of Medical Sciences and Intertek (UK), ozone treatment eliminates viruses, bacteria and mold by 99.99%. You can see the documents on the certification page.

The non-negotiable rule for homes with a baby: ozone treatment is done only in an empty, closed space. The baby, the mother, every adult, pets and plants must leave the area before work begins, and may return only after the rest and ventilation period set by the team. For the room where the baby will sleep, we recommend opening the windows for extra airing afterwards and letting the baby be the last person to go back in. Many families choose to bring the baby home the following day for peace of mind.

It is just as important to be clear that ozone comes after mud removal, washing, discarding damaged items and drying the house. It does not replace cleaning, it does not replace repairing walls with deep mold, and it is not a medical treatment. If your baby or anyone in the house shows worrying symptoms, see a doctor.

How the WHD team works in a home with a newborn

1. Survey and plan. The team asks how high the water rose, which room will be the nursery and where milk is prepared, then divides the home into zones, giving priority to the nursery and the room where the mother feeds at night.
2. Check readiness. Rooms must already be washed and dried. If there is still mud, if walls are very damp, or if materials have mold so deep they should be removed, the team will advise dealing with that first.
3. Prepare the space. The baby, people, pets and plants leave the area. Wardrobes and drawers are opened so ozone can reach inside, and windows and doors are closed tight. Formula, frozen breast milk and food should be taken out of the room or kept in sealed containers.
4. Fill the room with ozone. A generator brings the whole room up to working concentration. A typical cycle is about 30 minutes per zone, depending on room size and site conditions.
5. Contact time. Ozone is left to work on the air and surfaces for the set time.
6. Rest and ventilate. The machine is switched off, ozone is allowed to revert to oxygen, and the room is ventilated before anyone goes back in.

For ozone jobs of 15,000 baht or more, WHD includes a free medical-grade disinfectant spray, which makes it easier to keep high-touch surfaces clean afterwards. For a surface disinfectant to use after flood cleaning, see the Chemgene page. If repairs have left paint or chemical smells in the house, our ozone chemical-residue removal service may also help.

10 reasons to finish a nursery's flood recovery with ozone

1. It treats the air, not just surfaces. A baby breathes the room's air all day. Ozone fills the whole volume of the room and works on the air directly.
2. No chemical residue. Ozone turns back into oxygen, leaving no film or fumes on the crib, mattress or toys that end up in a baby's mouth.
3. It reaches where hands cannot. Behind the baby wardrobe, under the crib, inside air-con vents, window tracks and ceiling joints are all places moisture collects and cleaning is hard.
4. It tackles musty smells at the source. Ozone breaks down odour molecules instead of masking them with perfume, so there is no heavy scent to bother the baby.
5. It is backed by test results. According to the company's certified results from the Department of Medical Sciences and Intertek (UK), it eliminates viruses, bacteria and mold by 99.99%.
6. It fits a tight timeline. At about 30 minutes per zone, parents can plan the return date.
7. It suits fabric-heavy rooms. Curtains, bedding and baby wardrobes are hard to spray evenly, but a gas reaches everywhere.
8. It is done by a team that understands safety. WHD sets out room preparation, sealing and rest time systematically, rather than leaving a machine running by guesswork. See the service details.
9. It makes the decision to go home easier. When every step from washing and drying to whole-room disinfection is complete, parents have a clear reason to say the room is ready.
10. It can cover the whole house or just key zones. Start with the nursery, the feeding corner and the bathroom, then extend to the flooded ground floor. Ask about zoning.

Example case: a Khlong Chan townhouse where the nursery stayed dry but the smell would not go

An example case to explain the process, not a verified customer review.

Ton and his wife have a six-week-old son. Their three-storey townhouse is in the Khlong Chan area. During the late-September flood, water entered the ground floor, which held the living room and kitchen. The nursery is on the third floor. The family stayed with the wife's parents for about a week.

When they returned, Ton hired helpers to shovel out the mud and wash the ground floor. He threw out the sofa and the swollen plywood kitchen cabinets and ran fans for several days. The ground floor began to dry, but the third-floor nursery had a distinct musty smell. When he pulled the wardrobe away from the wall, he found small grey rings of mold on the wall behind it, and the heavy blackout curtains smelled like laundry that had never dried properly.

The team advised taking the curtains down to wash and dry in strong sun, cleaning the mold spots properly while wearing a mask and gloves, having the air conditioner cleaned, and discarding the foam play mat that had been on the ground floor in the floodwater. Only then was ozone scheduled, split into three zones: the nursery, the parents' bedroom where night feeds happen, and the whole ground floor. The family stayed at the grandparents' house throughout. After the rest and ventilation period set by the team, Ton came back and left the windows open for another half day, then brought his wife and son home the next morning.

What helped most, the family said, was understanding what each step was for, so they no longer had to guess. Results in every home depend on remaining moisture, materials and aftercare.

Recovery checklist for a home with a newborn: before and after ozone

While the baby is still away

• Keep the baby and mother somewhere safe and dry. Do not bring the baby in while mud is being shovelled or things are being removed.
• Before anyone goes in, have an electrician check wiring, sockets and breakers that were submerged. Electrical faults are a serious danger.
• Anyone cleaning should wear boots, rubber gloves, a mask and eye protection, and wash their hands after every session.
• Remove mud, wash floors and walls with clean water and detergent, then dry the house as fast as possible with good ventilation.
• Discard baby items that sat in floodwater and cannot truly be cleaned: mattresses, cushions, fabric or foam toys, and any teats or breast pump parts that were submerged.
• Wash fabrics that stayed dry but smell musty in hot water, as the label allows, and dry them completely in the sun.
• Bottles, teats and feeding equipment that stayed dry should be washed and sterilised as usual, by boiling or steaming. Ozone treatment of the room does not replace sterilising feeding equipment.
• If tap water looks cloudy or smells unusual, use bottled water or boiled water to prepare formula, and follow announcements from the relevant authorities.

On treatment day

• The baby, mother, older relatives, everyone, plus pets and plants, stay outside the area for the whole job.
• Take formula, breast milk, food and medicines out of the room or keep them in sealed containers.
• Open wardrobes, drawers and internal doors within the zone as the team advises.
• Do not open the door during the cycle or the rest period.

After ozone

• Re-enter only after the rest period set by the team, open the windows for extra airing, and let the baby come back last.
• Put on fresh bedding that is clean and completely dry, and place the crib away from any wall that was damp.
• If the musty smell returns in the first week, look for the moisture source, such as a wet wall or a leak.
• Limit how many people enter the nursery. Everyone washes their hands and changes clothes after being in flooded areas.
• If the baby has a fever, is unusually sleepy, feeds less, has trouble breathing or has frequent watery stools, see a doctor immediately.

Frequently asked questions from parents

1. Is ozone treatment safe in a home with a newborn?

Yes, when the process is followed correctly. The key is that treatment happens in an empty, closed room, with no baby, adults, pets or plants inside, and people return only after the rest and ventilation period. Ozone at working concentration should not be breathed, but once it has reverted to oxygen it leaves no residue.

2. How long before the baby can go back into the room?

A typical cycle is about 30 minutes per zone, followed by a rest and ventilation period that the team sets based on room size. For a baby, we recommend additional airing with the windows open, and many families bring the baby home the following day.

3. After ozone, can I use the same bottles straight away?

Do not treat room ozone as bottle sterilisation. Feeding equipment should be washed and sterilised the usual way, by boiling or steaming, and any pieces that sat in floodwater should be replaced.

4. If I use ozone, can I keep the mattress that was flooded?

No. Mattresses and cushions with foam cores that sat in floodwater can hold mud and germs deep inside and are hard to dry. Discard and replace them. Ozone is a step that comes after damaged items have been sorted out.

5. How is the price calculated?

It depends on area, number of zones and site conditions. Contact the team for an assessment. Jobs of 15,000 baht or more include a free medical-grade disinfectant spray.

Get the nursery ready before your little one comes home

Let the WHD team plan and carry out empty-room ozone disinfection for the nursery, the feeding corner and the flooded areas of your home: safe, thorough and with no chemical residue.

See the Residential Ozone Disinfection Service

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

Related pages

• Residential and building ozone disinfection
• Ozone chemical-residue and odour removal
• Chemgene disinfectant
• Certification documents
• Contact us

References

• 2026 Bangkok floods (Wikipedia)
• Al Jazeera: Disaster zone declared across Bangkok
• CDC: Floods, cleanup and mold guidance