The 2026 flooding on Rat Phatthana Road, Saphan Sung: what the news reported

According to a Thai PBS report dated 2 October 2026, Rat Phatthana Road, on the section linking Ramkhamhaeng and Kheha Romklao in Saphan Sung district, had standing water at some points and in many sois after about 30 millimetres of rain on 1 October. The Bangkok Metropolitan Administration used its "tor sing" drainage pipes to speed up pumping into Khlong Prawet Burirom. This reflects the situation on the day of the report and may change with each day's rain and drainage.

It came after a heavy late September. Thai PBS reported that Saphan Sung recorded 203.5 millimetres of rain on 25 and 26 September 2026, one of the three highest totals in Bangkok over that period. Citywide, more than 300 millimetres fell in about 48 hours, and all 50 districts were declared disaster zones on 26 September. As reported by Bangkok Biz News, the DDPM said on 6 October that 329,000 Bangkok households had been affected. Nationally, the DDPM's 06:00 update on 5 October 2026, published by Daily News, listed 26 provinces plus Bangkok and 1,270,151 households.

Put the two together and the picture is clear: more than 200 millimetres in late September, then only about 30 millimetres on 1 October that was enough to waterlog sois again. Homes that had just been scrubbed and were starting to dry got damp once more. That cycle of "wet, never fully dry, wet again" is exactly what indoor mold and bacteria thrive on.

Flood spots on Rat Phatthana Road, Saphan Sung, from the news report, and risk spots at home

The 2 October 2026 report said:

• Rat Phatthana Road, Ramkhamhaeng to Kheha Romklao section, Saphan Sung: standing water at some points
• Many sois in the area: waterlogged
• Trigger: about 30 mm of rain on 1 October 2026
• Drainage: the BMA used "tor sing" drainage pipes to pump water into Khlong Prawet Burirom

The report did not name sois, estates or depths, so we add nothing beyond it. In soi homes that flood repeatedly, check these spots:

• Ground-floor walls, inside and out, especially areas already cleaned once, where damp is building up
• Laminate and wooden floors and skirting, which swell and trap moisture underneath
• Ground-floor bathrooms, floor drains and the inspection pit by the gate, where sewage can back up
• Water tanks, pumps and water heaters installed at ground level
• Air-conditioner drip trays and outdoor units beside or behind the house
• Garages, storerooms and the space under the stairs, often full of cardboard
• Children's play corners and pet beds, closest to the floor

A typical scenario: the house that was just cleaned, then flooded again

An illustrative scenario based on common situations in housing estates after waterlogging. It does not describe any specific family.

Napa lives in a two-storey townhouse in a housing estate off Rat Phatthana Road with her husband, two children aged six and three, and her mother, who has asthma. In late September water rose in the soi and came into the ground floor. The family carried belongings upstairs, waited for the water to drop, then spent a weekend scrubbing floors, washing walls and running fans.

Before the house had fully dried, it rained again on 1 October. Not as hard as before, but the soi filled up again. Water seeped under the front door and overflowed from the ground-floor bathroom drain. Two days later Napa noticed small black spots on the wall she had just cleaned, some laminate boards had lifted, her mother was coughing more at night, and the youngest had a day of diarrhoea.

"We already cleaned. Why isn't it over? Where do we even start again?" That is why we wrote this post-flood germ ranking for Rat Phatthana, Saphan Sung: a home that gets wet twice needs a different order of work from one that floods once.

How we built the post-flood germ ranking for Rat Phatthana, Saphan Sung (an editorial ranking)

This is WHD's editorial ranking, not an official BMA or health agency ranking, and it does not use case data from Saphan Sung. We use no unsourced case counts or percentages. Five criteria:

1. Link to repeatedly wetted homes after waterlogging in WHO, CDC and Department of Disease Control guidance.
2. Severity if not properly cared for.
3. Who is at risk here: estate families with young children, older adults and people with respiratory conditions who are home all day.
4. Persistence, described qualitatively: how much the germ benefits from repeated wetting and incomplete drying.
5. Ease of spread within a home and between homes in the same soi.

Because of criteria one and four, mold takes first place here, unlike one-off floods where sewage bacteria usually lead. Higher ranks are what to plan for first; lower ranks still matter. Anyone feeling unwell should see a doctor without waiting for the clean-up.

Eight germs to watch in repeatedly flooded sois off Rat Phatthana Road

No. 1: Mold in homes that get wet again (Aspergillus, Penicillium, Cladosporium, Stachybotrys)

Why it ranks first. WHO and CDC advise cleaning and drying within 24 to 48 hours of a flood to limit mold. A home that never fully dried before the second round holds moisture deeper in walls and materials, which gives mold the biggest advantage of any germ.

Where it hides. Lower wall edges, under laminate floors, behind wardrobes and TV cabinets, under stairs, fabric sofas, curtains, storeroom cardboard and wooden skirting.

Symptoms and risk. Stuffy nose, cough, sneezing, itchy eyes, rashes and asthma flare-ups. Older adults with asthma, toddlers, allergy sufferers and people with weak immunity are most affected.

Prevention. Lift warped laminate so the slab beneath can dry, discard porous items soaked twice, ventilate with windows and extractor fans, wear a mask and gloves when cleaning mold, and don't paint until walls are truly dry.

How cleaning and spraying help. The CHEMGENE HLD4H product information says it covers fungi. Spraying works best after visible mold is removed, damaged materials are out and walls are drying. For lingering mustiness, residential ozone disinfection is a complementary option.

No. 2: E. coli and sewage bacteria in soi water (Escherichia coli)

Why it ranks second. Soi waterlogging usually means drains cannot keep up, so sewage from neighbouring homes mixes with the rain that seeps in and backs up through ground-floor bathroom drains. WHO and CDC advise treating floodwater as sewage-contaminated.

Where it hides. Ground-floor bathroom floors, floor drains, thresholds, kitchen floors, toys left on the floor and shoes by the door.

Symptoms and risk. Diarrhoea, cramps and nausea. Crawling toddlers are most likely to get it into their mouths and dehydrate quickly.

Prevention. Wash every toy that touched the water, cap floor drains during heavy rain, leave shoes outside and wash children's hands often.

How cleaning and spraying help. Scrub first, then spray the whole ground floor. E. coli belongs to the bacteria group the product says it covers in general; ask WHD for organism-specific test data.

No. 3: Leptospira, the cause of leptospirosis

Why it ranks third. Areas with drainage canals and repeatedly flooded sois host many rats. Residents wading in and out several times raise their chance of contact with rat urine. The Department of Disease Control warns about this whenever water stands.

Where it hides. Soi water, inspection pits, garages, storerooms and corners with rubbish bags.

Symptoms and risk. Sudden high fever, headache, calf pain and red eyes. Frequent waders with foot wounds are most at risk; see a doctor promptly with any fever after wading.

Prevention. Wear boots, cover wounds, wash feet with soap on coming in, keep rubbish in sealed bins and block rat entry points.

How cleaning and spraying help. Spraying does not replace boots or a doctor, but treats garage and storeroom surfaces after cleaning. Leptospira is a bacterium in the group the product names; we have no organism-specific result to cite.

No. 4: Norovirus and rotavirus in families with children

Why it ranks fourth. Many estate homes have young children. When sewage reaches the ground floor and children spend more time indoors, stomach viruses spread easily within the family, and to neighbours when children play together again.

Where it hides. Door handles, taps, toilet lids, toys, baby bottles and dining tables.

Symptoms and risk. Vomiting, diarrhoea and stomach pain; rotavirus is common in toddlers. See a doctor at once if a child is drowsy, passing little urine or refusing fluids.

Prevention. Wash hands with soap, wash toys and bottles, give a sick person a separate bathroom if possible, and clean touch points daily.

How spraying helps. The CHEMGENE HLD4H product information lists norovirus among covered organisms. Rotavirus falls in the virus group the product names; ask WHD for organism data.

No. 5: Hand-foot-and-mouth virus and RSV in children (Enterovirus, RSV)

Why it ranks fifth. The rainy season is peak time for HFMD and RSV in children. Damp homes with windows kept shut, and children playing together across the estate, give both a chance to spread.

Where it hides. Toys, children's blankets, pillows, door handles and play areas.

Symptoms and risk. HFMD brings fever, mouth sores and spots on hands and feet. RSV causes cough, runny nose and sometimes breathing difficulty in babies and toddlers; older adults can catch RSV too.

Prevention. Wash children's hands and toys often, keep sick children home until a doctor clears them, and seek care at once for fast or laboured breathing.

How spraying helps. The service information lists both hand-foot-and-mouth virus and RSV among covered organisms, so spraying living rooms and children's rooms after cleaning suits homes with toddlers and grandparents.

No. 6: Bacteria in still water and household plumbing (Pseudomonas aeruginosa, Legionella)

Why it ranks sixth. Estate homes often have water tanks, pumps and heaters at ground level. When floodwater reaches them, or water sits unused in pipes while the family lives upstairs, bacteria that like still water can multiply in the system.

Where it hides. Water tanks, shower heads, tap aerators, air-conditioner drip trays, unused pipes and slime in drains.

Symptoms and risk. Pseudomonas can cause skin, wound or ear infections; Legionella can cause pneumonia when contaminated water droplets are inhaled. Older adults, smokers and people with chronic illness are at higher risk.

Prevention. Have a technician check flooded tanks and pumps, clean the tank, run every tap for a while before use, and clean shower heads and drip trays.

How spraying helps. Both are bacteria in the group the product names, but not on the named list, so ask WHD for data. Spraying treats bathroom surfaces and areas around equipment; the inside of pipes and tanks needs a plumber.

No. 7: Skin fungi and "water-rotted feet" (dermatophytes, Candida)

Why it ranks seventh. Residents wading in and out of the soi several times in a week, and cleaning barefoot on wet floors, often end up with soggy, itchy feet. Rarely serious, but common and irritating.

Prevention and spraying. Wear boots while cleaning, dry feet after wading, replace wet doormats, and see a doctor if it spreads; people with diabetes should take extra care. The product information says it covers fungi, so spraying bathroom floors, entrances and shoe racks after drying reduces repeat contact.

No. 8: Wound bacteria and tetanus risk (Staphylococcus aureus, Streptococcus, Clostridium tetani)

Why it ranks eighth. Pulling up laminate, moving furniture and carrying belongings twice over leads to scrapes, cuts and nail punctures that skin and floodwater bacteria can enter.

Symptoms and prevention. Red, hot, swollen or pus-filled wounds and fever; tetanus can cause muscle stiffness. Ask a doctor if unsure about tetanus vaccination. Wear thick gloves and solid shoes, wash and cover wounds, and get deep ones checked.

How spraying helps. It does not treat wounds, but reduces germs on surfaces the family touches. These bacteria fall in the group the product names; ask WHD for organism data.

What happens when germs are ignored in a home that floods again

Health. Weeks of damp hit hardest those at home all day: grandparents with asthma, toddlers and people working from home. Lingering coughs, allergy flare-ups and children's diarrhoea can drag on until families assume it is just the rainy season.

Money and time. Laminate, wooden cabinets and sofas wetted twice are often ruined, and spreading mold makes wall and floor repairs costlier. Repeating the same clean every time it rains eats family weekends while mold and smell keep coming back.

Neighbours and property value. Stomach bugs and children's viruses cross from house to house. And musty smells and stained walls are the first thing a buyer or tenant notices.

Why repeating the same clean may fall short

• The moisture is inside. Under laminate and within walls, surface scrubbing does not dry anything.
• Round one was not finished. Residue and germs left from the first flood get fresh moisture from the second.
• Bleach needs care in homes with asthmatic grandparents and toddlers; strong fumes and wrong mixing can irritate airways.
• Contact time matters; wiping and rinsing straight off may not work as expected.
• Fans, air fresheners and paint dry, mask or cover, but do not disinfect.

WHD post-flood disinfection spraying for homes on Rat Phatthana Road and in Saphan Sung

World Health Disinfection is based in Bang Khae district, Bangkok 10160, and can serve Saphan Sung by appointment via 065-556-6294 or LINE @whd268. The team assesses the site and confirms a date in the queue; with so many households affected, we do not promise same-day service.

According to the service information, WHD's disinfection spraying service uses trained technicians, spraying and/or ULV (Ultra Low Volume) fine-mist fogging, and CHEMGENE HLD4H, a medical-grade UK disinfectant containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. The service page says it covers a broad spectrum of viruses, bacteria and fungi, including COVID-19, RSV, H1N1, H5N1 and hand-foot-and-mouth virus, claiming 99.99%; the product page adds norovirus, Salmonella and Bordetella pertussis. The page lists the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019. We make no claims for organisms not on those lists, and you can ask for test data first. The current promotion includes a free CHEMGENE spray bottle and WELLGIENIC wet wipes, and a tax invoice is available.

Service steps for a home that floods repeatedly

1. Contact and send photos of lower walls, floors, bathrooms and visible mold via LINE @whd268, and say how many times water came in.
2. Wait for the water to drop, then clean. Spraying follows scrubbing, mold removal and stripping out damaged materials.
3. Zone and prepare. Pack away food, medicines, toys and personal items; order rooms from bathroom to living room to storeroom.
4. Technicians spray. Everyone, including pets, leaves the zone; anyone with asthma should stay well away.
5. Wait for re-entry. About 30 minutes according to the service information; always follow the technician's on-site timing.
6. Keep it up and prepare for the next rain. Ventilate, wipe touch points and check walls weekly.

We do not claim spraying leaves no residue at all. Anyone ill should see a doctor; spraying is part of home recovery, not treatment.

10 reasons Rat Phatthana and Saphan Sung homes choose WHD spraying

1. A plan built for repeatedly wetted homes, starting with mold, our number one.
2. CHEMGENE HLD4H, which the product page says covers a broad spectrum of viruses, bacteria and fungi.
3. Named organisms include hand-foot-and-mouth virus, RSV and norovirus, relevant to homes with toddlers.
4. ULV mist reaches behind cabinets, under stairs and into storeroom corners.
5. Trained technicians, so no mixing chemicals yourself around people with asthma.
6. About 30 minutes before re-entry, or as the technician advises.
7. Suitable for detached homes, townhouses and soi shophouses.
8. A free CHEMGENE spray and WELLGIENIC wipes for daily touch points.
9. Tax invoices for estate juristic persons and businesses.
10. Ask for organism-specific data before booking. See the post-flood disinfection service.

Before and after spraying a home that flooded twice

Results depend on how many times water came in, how long the home stayed damp and how well it was cleaned first. This is an illustration, not a guarantee.

Example case: Napa's home restarts by the eight ranks

An illustrative example, not a real customer review.

This time Napa did not start by scrubbing the floor. She started with rank one. She lifted the warped laminate so the slab could dry, threw out the cardboard under the stairs and the twice-soaked rug, scraped mold from the wall edges and ran windows and extractor fans for days. Her mother stayed with relatives for a while, and the youngest saw a doctor about the diarrhoea. Once the walls were drying, her husband sent photos to LINE @whd268 and booked a date. On the day, toys and food went upstairs, everyone waited outside, and the technician sprayed the bathroom, living room and storeroom in turn. Afterwards a plumber checked the flooded pump, Napa bought drain caps for heavy rain, and set a phone reminder to check the walls every Sunday.

Recovery checklist for a Rat Phatthana soi home

Before spraying

• Check ground-floor electrics are safe
• Wear boots, rubber gloves and a mask
• Lift twice-soaked flooring so the slab can dry
• Scrape visible mold and discard twice-soaked porous items
• Scrub bathrooms, drains and the inspection pit
• Have flooded tanks, pumps and heaters checked
• Pack away food, medicines and toys

After spraying

• Re-enter at the technician's time and ventilate
• Wipe handles, taps and toys daily for the first week
• Check lower walls weekly for new mold
• Keep drain caps and a door barrier ready
• Watch for cough, fever, diarrhoea or rash and see a doctor

FAQ: post-flood germ ranking for Rat Phatthana, Saphan Sung

Q: How can about 30 mm of rain flood the soi?
A: The report only says that after about 30 mm on 1 October 2026 there was standing water at some points and in many sois, and the BMA pumped water into Khlong Prawet Burirom. We won't speculate further; what matters is that homes can get wet again, so be prepared.

Q: Why is mold first, not leptospirosis or E. coli?
A: Our criteria weight repeated wetting, which favours mold most. Ranks two and three still matter, and anyone with fever after wading must see a doctor.

Q: Is this an official BMA ranking?
A: No. It is WHD's editorial ranking, not case statistics.

Q: If water comes in again after spraying, do we spray again?
A: Clean again every time and consider spraying again depending on conditions. Spraying is not a permanent shield.

Q: Can an estate's juristic person book spraying for common areas?
A: Yes. Contact 065-556-6294 or LINE @whd268 to assess clubhouses, guard posts and playgrounds; tax invoices are available.

Flooded twice? Don't just repeat the same clean. Let WHD spray after you clean

Free consultation. Send photos and book a date.

See the Disinfection Spraying Service

Call 065-556-6294 | LINE @whd268

Related services and references

• WHD disinfection spraying service
• Residential ozone disinfection
• Thai PBS, 2 October 2026: Rat Phatthana Road waterlogging, Saphan Sung
• Thai PBS: Bangkok rainfall, late September 2026
• Bangkok Biz News: Bangkok households affected
• Daily News, 5 October 2026: DDPM flood report
• CDC: Floods | WHO Fact sheets | Department of Disease Control