The far end of Lat Phrao Road is not just malls and roadside shops. Deep inside Soi Lat Phrao 122, Soi Lat Phrao 110 and Soi Lat Phrao 89 are townhouses, small detached homes, apartments and dormitories packed together into real communities. Many have toddlers, grandparents at home all day, and parents who commute through the Pradit Manutham intersection. When heavy rain hit at the end of September 2026, water flowed into these sois and left mud and worry behind.

This article is written for families living in these sois. We set out where the water was according to news reports, which germs matter most for homes with children and older relatives, why mopping alone may not cover everything, and how disinfection spraying in Lat Phrao 122 and nearby sois from World Health Disinfection (WHD) works. Throughout, we stress that spraying comes after mud removal and washing, and that anyone who feels unwell should see a doctor first.

Where Soi Lat Phrao 122, 110, 89 and the Pradit Manutham intersection flooded

Before talking about germs, here are the facts. Everything in this section comes from news reports and official announcements; we have not added any numbers or dates of our own.

• Soi Lat Phrao 122: according to Thai PBS on 29 September 2026 at 13:19, there was about 15.5 cm of water on the road at the time of the report, and the same report listed Soi 122 among the flood points on Lat Phrao Road.
• Lat Phrao Road at Soi 110 and Soi 89: according to the same Thai PBS report, about 10 cm of water on the road at that time.
• Pradit Manutham intersection on Lat Phrao Road: listed by Thai PBS as a flood point, together with the Happyland intersection, Bang Kapi Junction, Soi 101/1 and Soi 122.
• Lat Phrao Road near Si Burapha: news reports on 30 September 2026 still described 20 to 40 cm of water on the road.
• Lat Phrao Road from Lat Phrao 101 to Bang Kapi Junction: reported by Daily News on 29 September 2026 as having high water.
• Khlong Saen Saep: according to Thairath, canal water overflowed onto the Lat Phrao to Ramkhamhaeng roads.
• Citywide: according to news reports, about 300 mm of rain fell in roughly 48 hours between 24 and 27 September 2026. A BMA announcement on 26 September declared all 50 districts disaster zones, and the Department of Disaster Prevention and Mitigation reported on 2 October that about 329,000 Bangkok households were affected.

Ten or 15.5 centimetres may not sound like much, but these were road levels on the afternoon of 29 September, not the peak of the event, and they say nothing about how high water rose inside any given house. Homes with floors below road level, homes at the far end of a soi or next to a drain can take water even when the road looks only slightly wet. More important than height is how long the water stays, because the longer it sits, the deeper residue and germs soak into floors, walls and furniture.

A typical scenario (an illustrative example case, not the story of any specific family)

A townhouse at the end of Soi Lat Phrao 122 and a two-year-old who loves the floor

Nan lives in a two-storey townhouse at the end of Soi Lat Phrao 122 with her husband, their five-year-old son, two-year-old daughter, and her seventy-year-old father, who has had diabetes for years. Downstairs is a living room with foam play mats for her daughter to crawl on, a basket of toys, a small kitchen and a bathroom. Bedrooms are upstairs.

On the night of nonstop rain, water started bubbling up from the drain outside. Soon it slid under the door into the living room. It was not deep, but it soaked the play mats, the toy basket, the sofa legs and boxes of documents on the floor. Worse, water in the downstairs toilet and floor drain pushed back up with a smell that made everyone cover their noses.

The family moved the children and grandfather upstairs for two nights. Nan's husband waded down the soi to buy drinking water and food, and came back with a scrape on his leg from something he could not see under the water.

When the water receded, they shovelled out the mud, threw away the soaked mats, mopped with floor cleaner and soaked plastic toys in dish soap. A few days later their son had a mild fever and small sores in his mouth, their daughter had diarrhoea, and grandfather complained the downstairs smelled so musty he did not want to sit there. Nan took both children to a doctor, who treated them and advised extra care with toys, surfaces and keeping the sick child's things separate.

That night Nan looked at the living room that used to be her children's playroom and thought: we cleaned, but is it clean enough? It is the same question many families in Lat Phrao 122, 110 and 89 are asking right now.

The post-flood germs that matter most for homes in Soi Lat Phrao 122 and nearby

Soi homes differ from roadside restaurants because families live close to the floor. Toddlers sit and crawl on it, older people stay home all day, and everything gets handled many times a day. So we have ordered these germs by the risk to families in this area.

Hand, foot and mouth disease virus

Hand, foot and mouth disease is common in young children, especially under five. Parents usually notice fever, a sore mouth with ulcers, and a rash or blisters on the palms, soles and sometimes the bottom. Children may refuse food and drink because their mouth hurts. The virus spreads through saliva, nasal mucus, blister fluid and stool, and survives for a while on toys, handrails and tables.

After a flood, children are cooped up together longer and floodwater-soaked toys get picked up again before proper cleaning. According to the service information, the CHEMGENE HLD4H disinfectant WHD uses is listed as effective against the hand, foot and mouth virus.

RSV in young children

RSV causes cold-like symptoms, but in some infants and toddlers it moves into the lungs, causing fast or wheezy breathing. Older people with chronic illness can also become seriously ill. It spreads through coughs and sneezes and via hands that touch contaminated surfaces and then the eyes, nose or mouth. A damp house with more people in it calls for extra care. If a child struggles to breathe, see a doctor urgently.

Rotavirus, norovirus and sewage bacteria

When drains and toilets push water back into the house, faecal germs come with it: bacteria such as E. coli and Salmonella, and viruses such as rotavirus and norovirus. Rotavirus mainly affects small children, causing watery diarrhoea, vomiting and rapid dehydration. Norovirus moves through families fast; when one person gets it, others often follow within days. In a townhouse, focus on the downstairs bathroom, the kitchen floor, door frames and the living-room floor where children crawl.

Warning signs of dehydration in a child with diarrhoea include passing less urine, a dry mouth, crying without tears, drowsiness, or vomiting so much they cannot keep anything down. Any of these means seeing a doctor straight away.

Leptospirosis for anyone who waded through the soi

Dense sois with bins and open drains tend to have rats. In a flood, urine from infected rats mixes into the water, and anyone wading out to buy supplies, get to work or help neighbours can be infected through cuts on legs and feet. Key symptoms are a sudden high fever, headache and muscle pain, especially in the calves, sometimes with red eyes. If these appear within days to a few weeks of wading, see a doctor and mention the floodwater; early treatment makes a big difference.

At home, the carport, the front steps, the ground floor and the shoes worn for wading are the places to clean and disinfect to reduce this risk.

Mold and musty smells in a house shut up for days

Townhouses in narrow sois often have windows on only one side. Once lower walls, laminate floors, cabinet bases and sofas soak up water, moisture can linger for weeks. Mold shows as black dots or green patches in corners, behind cabinets and under the stairs, worsening allergies and asthma. Toddlers who sleep and play near the floor breathe in more spores than adults. WHO and the CDC advise drying flooded areas quickly, generally within 24 to 48 hours, and discarding absorbent materials that cannot be dried.

Who is most at risk in a multi-generation home

• Children under five: HFMD, RSV and rotavirus, because they crawl and put hands in their mouths.
• Older adults, especially with diabetes, heart or kidney disease: dehydration and slow-healing foot wounds.
• Pregnant women: should avoid wading and cleaning heavily muddy or moldy areas.
• People with allergies or asthma: sensitive to mold and musty air.
• Anyone who waded regularly: leptospirosis and wound infections.

The water is gone, but problems in Lat Phrao 110, 122 and 89 homes are not

Children who keep getting sick: parents often describe kids recovering and falling ill again because germs remain on toys or floors. One family member gets better, another gets sick, until the whole household is worn out.

Costs that keep coming: doctor visits, medicine, new mats, mattresses and curtains, appliance repairs and unpaid leave to care for sick children.

Lost time: working parents spend every day off cleaning, then get up at night with a sick child.

Neighbours: in a soi of joined houses, one home with lingering mold or smell affects the next, and children who play together pass germs back and forth.

Peace of mind: the feeling that "the house isn't safe for my kids" is a heavy weight. Many families keep children upstairs for weeks.

Common fixes that often fall short in homes with toddlers

Ordinary floor cleaner: most are made to lift dirt and leave a pleasant scent, not to deal with sewage germs or childhood viruses, and they usually only go on the floor, missing lower walls, table legs, stair rails and corners.

Soaking toys in dish soap: it removes grime, but toys with holes or hollow parts trap floodwater inside. Those should be thrown away; solid plastic toys need proper cleaning and disinfection.

Over-strong bleach: stronger is not better. Bleach fumes in a closed room irritate airways, especially for children and asthmatics, and mixing bleach with acidic toilet cleaners can release dangerous gas.

Closing up and running the air conditioner: doing this while walls are still damp can draw mold into the unit and spread it around the room.

Cleaning only the ground floor: water may have stayed downstairs, but people go up and down all day. Shoes and hands carry germs to bedrooms, so stair rails and upstairs door handles matter too.

WHD disinfection spraying for Lat Phrao 122, 110 and 89: what it is and how it works

According to World Health Disinfection's service information, trained technicians apply disinfectant by spraying and/or ULV (Ultra Low Volume) fogging. The fine mist settles evenly on surfaces, including room corners, under stairs, lower walls and around furniture, where hand-wiping often misses spots.

The disinfectant is CHEMGENE HLD4H, a medical-grade product from the UK containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. According to the service information, it is listed as effective against viruses, bacteria and fungi, including the hand, foot and mouth virus, RSV, COVID-19, H1N1 and H5N1, with a stated efficacy of 99.99%. The service page lists approvals or endorsements from the Thai Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019.

For families with toddlers, the listed organisms include the hand, foot and mouth virus and RSV, the two illnesses parents worry about most now.

Steps, according to the service information

1. Book: call 065-556-6294 or LINE @whd268 with your soi address, such as Lat Phrao 122, 110 or 89, the type of house, number of floors, and whether young children or older people live there.
2. Prepare the home: remove mud, wash floors and walls, discard absorbent items that cannot dry, and pack toys, baby bottles, children's dishes, food and toothbrushes into lidded boxes or take them out.
3. Technicians spray: spraying and/or ULV fogging in the agreed areas. Everyone, including children, older relatives and pets, leaves the zone being treated.
4. Wait about 30 minutes: according to the service information, and return only when the technicians say so.
5. Back to normal: open windows to ventilate, and ask the technicians how to prepare surfaces children use, such as play areas and dining tables, before kids return.

As in every article: disinfection spraying comes after mud removal and washing, not instead of them. We do not claim spraying leaves no residue, so follow the technicians' instructions on leaving and re-entering. Spraying is not medical treatment; a child or older person with symptoms needs a doctor.

According to the service information, WHD serves hospitals, schools, malls, airports, offices, airlines, banks and residential buildings. The service includes a free CHEMGENE spray bottle and WELLGIENIC wet tissues, handy for wiping toys and high-touch points, and a tax invoice is available.

If bedrooms or the living room still smell musty, you may consider residential ozone disinfection as a complementary service. It must be done in a closed room with no people, pets or plants, and you re-enter only after the rest and ventilation period.

10 reasons families in Lat Phrao 122, 110 and 89 choose spraying after the water goes down

1. Toddlers live on the floor. Play areas deserve disinfection after washing, not just a scented mop.
2. Soi water came with drain water. Backed-up drains bring faecal germs, and post-flood disinfection spraying treats the surfaces that water touched.
3. The listed organisms match parents' worries, including the hand, foot and mouth virus and RSV, according to the service information.
4. Grandparents do not have to scrub every corner, reducing fall risk and direct contact with germs.
5. Fine mist reaches hidden spots under stairs, behind cabinets, around sofa legs and on lower walls.
6. The whole house, not just downstairs. Stair rails, bedroom door handles and upstairs bathrooms can be included; see the WHD disinfection service.
7. A short wait. About 30 minutes according to the service information, or as the technicians advise. A walk to the mouth of the soi and you are home.
8. A disinfectant with clear documentation, referencing EN 14476 and several approving bodies.
9. Free items for ongoing care: the CHEMGENE spray and WELLGIENIC wipes for toys and door handles every day.
10. Peace of mind returns. Parents feel able to let kids play downstairs again. Book a spraying visit by phone or LINE.

Before and after: a Lat Phrao soi townhouse with young children

Note: a general illustration. Actual results depend on the home and how well it is prepared before spraying.

Example case: Nan's home in Soi Lat Phrao 122 after spraying

Example case (illustrative scenario, not a verified customer review)

Once both children had been seen by a doctor, Nan decided to start over systematically. She and her husband threw out all the foam mats, soft toys and toys with holes, kept only hard plastic toys that could be washed, discarded wet document boxes, scrubbed downstairs floors and walls, cleaned the bathroom and floor drain, and left windows open with fans running to dry the house quickly.

When the house was dry enough, she booked the spraying service and told the team about the two small children and her diabetic father. The technicians asked her to pack away children's things, bottles, toothbrushes and food, and for everyone to leave during spraying. Her husband took the kids and grandfather to a noodle shop at the mouth of the soi while Nan waited outside. When the re-entry time had passed, they went back in and opened the windows.

What impressed Nan most was that the technicians pointed out spots she had never thought of: under the lip of the first stair, the bathroom door frame and the fridge handle. Since then she wipes the toys with the free spray every evening. Her daughter crawls in the living room again on a new mat, and grandfather is back watching TV downstairs.

Recovery checklist for Lat Phrao 122, 110 and 89 homes with children and older relatives

The first week after the water drops

• Keep toddlers, pregnant women and older relatives away from mud clearing.
• Adults cleaning wear boots, rubber gloves and masks, and cover leg wounds.
• Have an electrician check downstairs sockets and wiring before use.
• Discard soaked mats, soft toys, toys with holes, mattresses and rugs.
• Throw out food, formula and baby bottles that touched floodwater.
• Wash floors, lower walls, bathrooms and floor drains with clean water and detergent.
• Open windows and use fans or dehumidifiers to dry the house fast.

Spraying day and afterwards

• Pack children's things and food into lidded boxes.
• Everyone and every pet leaves the zone being sprayed.
• Wait about 30 minutes or as the technicians advise, then ventilate.
• Wipe toys, door handles, stair rails and fridge handles daily for several weeks.
• Wash children's hands before meals and after play.
• Watch for fever, mouth sores, hand or foot rash, fast breathing, severe diarrhoea or calf pain, and see a doctor if they appear.

FAQ from homes in Soi Lat Phrao 122, 110 and 89

Q: The news said Lat Phrao 110 and 89 only had about 10 cm of water. Do we really need spraying?
A: That was the road level at the time of the 29 September 2026 report, not the level inside any particular home. If water entered your house or backed up through the bathroom, and you have children or older relatives, spraying after washing adds real confidence.

Q: My child has hand, foot and mouth disease right now. Should we spray immediately?
A: First make sure your child is under a doctor's care and follow their advice on separating belongings. Spraying deals with surfaces; book it for a day when everyone can leave the house during treatment.

Q: How long do we need to stay out?
A: About 30 minutes after spraying, according to the service information, but follow the time the technicians give on the day.

Q: Can toys be sprayed, or should we pack them away?
A: Mention it when booking. Items children put in their mouths, such as bottles, teats and spoons, should generally be packed away; follow the technicians' advice for other toys.

Q: We live near the Pradit Manutham intersection. Water did not enter the house, but the carport flooded. What should we do?
A: Carports and entrances are where shoes and tyres carry mud inside. Clean them thoroughly, and you can ask for just these areas to be sprayed.

Q: Grandpa waded through the soi and now has a fever and calf pain.
A: Take him to a doctor quickly and mention the floodwater. These symptoms may be linked to leptospirosis, which needs medical diagnosis and treatment.

Do you live in Soi Lat Phrao 122, 110, 89 or near the Pradit Manutham intersection?

Once the house is washed, let the WHD team finish with disinfection spraying so your children can play on the floor again with peace of mind.

Book home disinfection spraying

Call 065-556-6294 · LINE @whd268

Related links

• World Health Disinfection spraying service
• CHEMGENE HLD4H medical-grade disinfectant
• Residential ozone disinfection for musty rooms

References

• Thai PBS: Bangkok flood points and road water levels (29 Sep 2026)
• Daily News: Bangkok flood situation (29 Sep 2026)
• Post Today: Bangkok floods 2026
• Department of Disease Control, Thailand
• CDC: Floods
• WHO fact sheets