The Khlong Ket Runoff, 25 September 2026

According to the Lop Buri Provincial Public Relations Office (lopburi.prd.go.th) on 25 September 2026, heavy rain fell on hills in the area, such as Phu Khao Tabaek and Khao Nom Nang, during the night of 24 to 25 September. Runoff flowed into villages in Khlong Ket from about 10:00, grew stronger around 15:30, and reached roughly 60 centimetres.

The same report said more than 100 households, about 300 people, were affected: 16 households in Moo 5, about 10 in Moo 1, about 60 in Moo 2 and about 40 in Moo 9, and vulnerable people were evacuated. These figures describe the reporting date; follow the latest notices from Khok Samrong district and the local administrative organisation.

Nationally, the Department of Disaster Prevention and Mitigation (DDPM) reported, with data as of 06:00 on 7 October 2026 published by the Government Public Relations Department, that floods had affected 27 provinces plus Bangkok, 123 districts and 984 subdistricts, with 1,154,875 households and more than 3.1 million people affected.

Flash floods differ from slow, standing floods. Fast water scours topsoil from slopes and carries sediment, gravel, branches, plant debris and animal droppings. In the village it leaves thick silt on floors, yards and pens, while sharp debris makes wounds common among people wading or clearing up. At around 60 centimetres it also reaches low beds, floor mattresses, lower cabinets and low sockets.

A Typical Scenario: The Single-Storey House the Runoff Reached Mid-Morning

Note: an illustrative example case based on situations commonly seen after flash floods in foothill villages, not the story of any real person in Khlong Ket.

Auntie Malee lives in a single-storey concrete house with her son, her pregnant daughter-in-law and her mother, who is nearly 90. Mid-morning, she saw cloudy brown water running along the road and assumed it was rain the drains could not handle. Within a few hours it pushed through the gate and into the house, bringing sticks, bamboo and small stones. Officials and neighbours moved her mother and daughter-in-law to safety first, in line with evacuating vulnerable people.

Her son stayed to lift belongings, stepped on a branch underwater and cut his sole, and rubbed his eyes several times with muddy hands. The next day his eyes were red and watering. A boxed meal handed out in the evening sat until morning because nobody was hungry, and Auntie Malee nearly reheated it for breakfast.

When the water dropped, the house was covered in reddish sandy silt several centimetres thick. Lower wooden cabinets had swollen, the gypsum wall in her mother's room had a damp band, document boxes were soaked, the water jar outside had sediment floating in it, and the bathroom smelled bad. Her daughter-in-law's first question was: "When can Mum and Grandma come back, and will it be safe for the baby?" Answering that well starts with knowing where each germ comes from and who it threatens.

Flood Germs in Khlong Ket, Khok Samrong: Ten After the Flash Flood

Runoff combines slope soil, animal waste and household wastewater. The germs to watch therefore include soil organisms that enter wounds, germs in drinking water and food, germs spread to the eyes and skin, and moulds on materials that stay wet. The information below is general, in line with WHO, CDC and Thailand's Department of Disease Control, and is not diagnosis or treatment. See a doctor for any worrying symptoms.

1. Leptospira spp. (leptospirosis)

How the flood spreads it: runoff through fields, farms and pens washes the urine of rats and livestock such as cattle and buffalo across the village, and rats escaping the water move into homes and sheds.

Where it hides: wet silt, puddles beside houses, animal pens and corners with signs of rats.

Symptoms and risk: sudden high fever, headache, calf pain and red eyes, from a few days up to about four weeks after wading. People with foot wounds and those cleaning without boots are most at risk.

Prevention: boots and rubber gloves, waterproof dressings, soap afterwards, and a doctor promptly for fever after flood contact.

2. Clostridium tetani (tetanus) from soil and debris wounds

How the flood spreads it: tetanus bacteria live in soil as hardy spores. Runoff brings large amounts of soil, stones and branches, so people wading or clearing debris are often punctured by sharp objects, giving the bacteria a route into deep wounds.

Where it hides: silt left indoors, piles of debris, loose nails and roofing sheets, and bare yards.

Symptoms and risk: jaw stiffness, difficulty opening the mouth and painful muscle spasms, a condition that needs hospital care. People without a recent booster and older adults should be especially careful.

Prevention: thick-soled boots and heavy gloves for debris, rinse wounds with clean water straight away, and see a doctor about tetanus vaccination after any puncture or soil-contaminated wound. Vaccination and wound care, not spraying, are the main protection.

3. Salmonella Typhi (typhoid fever)

How the flood spreads it: typhoid spreads through food and water contaminated with an infected person's faeces. When runoff passes latrines and septic tanks and flows into uncovered water jars, even clear-looking water may carry it.

Where it hides: water jars, storage tanks, food containers and unwashed hands.

Symptoms and risk: fever that climbs and lasts for days, headache, weakness, abdominal pain and constipation or diarrhoea. Anyone with persistent fever after the flood should see a doctor; a vaccine exists, so ask a doctor if interested.

Prevention: bottled or boiled water, washing and disinfecting jars and tanks before refilling, freshly cooked food and handwashing. WHD's product information lists Salmonella as covered; ask the team for data specific to the Typhi type.

4. Adenovirus and post-flood conjunctivitis

How the flood spreads it: viral pink eye is common during floods because people rub their eyes with dirty hands, share towels and live close together in shelters. Adenovirus is a frequent cause and spreads easily on hands and objects.

Where it hides: face towels, pillowcases, door handles, remote controls, phones and hands.

Symptoms and risk: red, gritty, watery eyes with discharge, sometimes fever or sore throat. Anyone can catch it; children and household contacts are at high risk.

Prevention: do not rub your eyes, wash hands often, use separate towels and pillows, never share eye drops, and see a doctor for severe redness, pain or blurred vision. It is in the virus group; ask WHD for organism-specific test data.

5. Streptococcus pyogenes (group A strep) and skin infections

How the flood spreads it: scratches from branches, or scratching itchy skin after wading, let skin and environmental bacteria such as Streptococcus in, especially when skin stays dirty and damp.

Where it hides: shared towels, bedding, unwashed clothes and high-touch surfaces.

Symptoms and risk: crusted sores in children, spreading red, hot, swollen skin, and fever. Older adults, people with diabetes and children who pick at sores are at risk.

Prevention: shower after wading, keep nails short, clean and cover wounds, do not share towels, and see a doctor if redness spreads or fever starts. It is in the bacteria group; ask WHD for specific test data.

6. Nontuberculous mycobacteria (for example Mycobacterium fortuitum)

How the flood spreads it: these mycobacteria live naturally in soil and water. When runoff carries slope soil indoors and wounds stay in contact with mud, skin infections can occur, although less often than with other germs.

Where it hides: wet silt, standing water in containers, pipes and soaked materials.

Symptoms and risk: a wound that heals unusually slowly, or red lumps around it weeks after the injury. People with weak immunity or chronic wounds should take care and tell a doctor the wound touched flood mud.

Prevention: rinse wounds after mud contact, keep them dry, and clean surfaces before disinfecting. Mycobacteria are among the groups WHD's product information lists.

7. Hepatitis E virus from contaminated drinking water

How the flood spreads it: hepatitis E spreads through drinking water contaminated with faeces, and outbreaks after floods have been seen in several countries. Where households rely on jars, shallow wells or tanks, contamination from runoff is a concern.

Where it hides: flooded jars and tanks, shallow wells and scoops.

Symptoms and risk: tiredness, nausea, abdominal pain, yellow skin or eyes and dark urine. Pregnant women are more likely than others to become seriously ill, so they should be especially careful about drinking water and see a doctor at once if symptoms appear.

Prevention: drink only bottled or boiled water, wash then disinfect storage containers, and wash hands before preparing food. It is in the virus group; ask WHD for specific test data.

8. Bacillus cereus and food kept too long after the flood

How the flood spreads it: this soil and dust bacterium forms heat-resistant spores. Cooked rice or food left at room temperature for hours, such as donated boxed meals kept overnight during a power cut, lets it multiply and produce toxins.

Where it hides: rice cookers, food containers, fridges without power, and food touched by water or silt.

Symptoms and risk: vomiting or diarrhoea within hours of eating, usually self-limiting, but young children, older adults and pregnant women should guard against dehydration.

Prevention: eat freshly cooked food, do not leave cooked rice out for long, and discard food from fridges that lost power or that touched floodwater. Its spores are tougher than ordinary bacteria, so correct food handling is the main protection.

9. Cryptosporidium parvum, a chlorine-tolerant water parasite

How the flood spreads it: this single-celled parasite is found in the faeces of people and animals such as calves and spreads through contaminated water. Runoff through pens and latrines can carry it into household water, and it tolerates chlorine at normal levels.

Where it hides: water jars, shallow wells, tanks and the hands of people cleaning animal pens.

Symptoms and risk: watery diarrhoea, stomach cramps and nausea that can last days, longer or more severe in people with weak immunity, small children and older adults.

Prevention: boil water or use bottled water, wash hands with soap and water after handling animals and before eating, and keep surfaces dry. Single-celled parasites are not in the virus, bacteria or fungi groups the product information lists, so safe water and personal hygiene are the main defence.

10. Stachybotrys chartarum, black mould on gypsum, paper and wood

How the flood spreads it: this black mould favours cellulose-rich materials that stay wet for days, such as gypsum board, paper, cardboard and plywood. A house reached by 60 centimetres of water has plenty of soaked lower gypsum, plywood cabinets and boxes. WHO and CDC advise drying homes quickly, generally within 24 to 48 hours.

Where it hides: behind gypsum walls, under plywood cabinets, document boxes, wooden door frames and laminate floors.

Symptoms and risk: blocked nose, cough, eye and throat irritation, and flare-ups of allergies and asthma. Older adults, pregnant women, young children and people with respiratory disease should avoid rooms with heavy mould.

Prevention: cut out or remove soaked, mouldy materials such as lower gypsum and cardboard, ventilate, and wear a fine-filter mask, gloves and goggles; disinfect hard surfaces once dry. The product information states coverage of fungi in general.

The big picture: the Khlong Ket runoff brought several groups at once: soil germs entering wounds (tetanus, mycobacteria, Streptococcus), animal-linked germs (Leptospira, Cryptosporidium), water and food germs (typhoid, hepatitis E, Bacillus cereus), an eye virus (adenovirus) and black mould. Some are best prevented with vaccination, safe water and food handling; germs on household surfaces are reduced by washing, drying and systematic disinfection.

Why Washing Out the Silt Is Not Enough

• Flash-flood silt is fine and clings, leaving a film in tile grout and along wall edges even after hosing.
• Floor cleaners are not designed to disinfect; they lift dirt but do not reduce germs like a disinfectant.
• Homes with older adults and pregnant women need more assurance than "it looks clean".
• Mixing chemicals can release dangerous gases; CDC warns never to combine bleach with ammonia or other cleaners.
• High-touch points get missed, such as handles, switches, rails and table edges.
• Time and labour are short while clearing debris, fixing fences and caring for vulnerable relatives.

Many families therefore clear the silt themselves and bring in a professional team to spray as the last step before bringing older and pregnant relatives home.

WHD Post-Flood Disinfection Spraying for Homes in Khlong Ket

According to the service information, World Health Disinfection (WHD) uses trained technicians who spray and/or apply ULV (Ultra Low Volume) fogging, a fine mist that reaches tile grout, wall edges and gaps around furniture.

The disinfectant is CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. According to the product information it is broad-spectrum, covering viruses, bacteria and fungi. Organisms named on WHD's pages include SARS-CoV-2 (COVID-19), RSV, influenza H1N1, H5N1, hand-foot-and-mouth virus, norovirus, Salmonella, mycobacteria and fungi. The service page states 99.99% effectiveness, and the product page states 99.85% against COVID-19 within one minute. The service page also lists Thailand's Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019, and customers such as hospitals, schools, malls, airports, offices, airlines, banks and residential buildings.

Being clear about efficacy: of the germs here, Salmonella (in general), mycobacteria and fungi are named on the website. Leptospira, adenovirus, Streptococcus and hepatitis E are not named, but belong to the bacteria or virus groups the product information says it covers. For tetanus, Bacillus cereus and Cryptosporidium, the main protection is vaccination, food handling and safe water. WHO and CDC advise cleaning then disinfecting flood-contaminated surfaces. Ask the WHD team for test data on any specific organism.

Service in Lop Buri: WHD is based in Bang Khae, Bangkok 10160, with no branch in Lop Buri. Jobs in Khok Samrong and nearby areas are arranged by phone or LINE; the team asks about house size, rooms and post-flood condition before booking a date, which depends on the schedule and road conditions.

The Five-Step Spraying Process After a Flash Flood

1. Survey: send photos and details by LINE or phone, such as the water level, rooms used by older or pregnant family members, and spots with mould or odour.
2. Remove silt and wash first: shovel out silt, clear sticks and stones, remove heavily mouldy materials, wash floors and walls with water and detergent, and ventilate to dry.
3. Zoning: older relatives' rooms, the pregnant family member's room, kitchen, bathroom and surroundings.
4. Spraying: technicians apply CHEMGENE HLD4H by spray and/or ULV mist over floors, walls, furniture and high-touch points. Occupants and pets leave the zone being sprayed.
5. Re-entry: according to the service information, wait about 30 minutes before normal use; follow the time the technicians give on the day, and ventilate.

Promotion per the service information: a free CHEMGENE spray bottle and WELLGIENIC wet wipes with the service, and a tax invoice is available.

10 Reasons Khlong Ket Homes Should Be Disinfected After the Runoff

1. Slope silt leaves a film of soil and soil germs across surfaces.
2. Water passed pens and latrines, raising contamination from urine and faeces.
3. About 60 cm of water reached low beds, lower cabinets and walls people touch often.
4. Vulnerable people are returning: older adults, pregnant women and young children.
5. Gypsum and plywood invite black mould; disinfecting after removal and drying reduces what remains.
6. ULV mist reaches grooves where silt film lingers. See the disinfection service
7. A medical-grade product used in hospitals and public buildings, per the service information.
8. Trained technicians avoid the risks of home-mixed chemicals.
9. It saves family energy for debris clearing and repairs. Book the service
10. Confidence before bringing loved ones home after vulnerable relatives were evacuated.

Before and After Spraying

Note: spraying reduces germs on surfaces; it does not replace repairs, removing damaged materials, vaccination or medical care.

Example Case: Before Grandma Came Home

Continuing the illustrative scenario above; not a real customer review.

After the water fell, Auntie Malee's son saw a doctor about his red eyes and foot wound and had his tetanus status reviewed. The family threw out the overnight boxed meal and food from the unpowered fridge, shovelled out the silt, removed the spotted lower gypsum in Grandma's room, discarded wet boxes, washed the floors and the water jar, and opened every window. They then sent photos to the team on LINE. On the day, technicians started with Grandma's room and the daughter-in-law's room, then the kitchen, bathroom and surroundings, while everyone waited outside the zone and returned at the stated time.

Recovery Checklist for Khlong Ket, Khok Samrong

• Follow local notices; more rain on the hills can bring runoff back.
• Have electrics checked, and watch for snakes and other animals indoors.
• Wear thick-soled boots, heavy gloves, a mask and goggles.
• Discard flooded food, water and medicines, and cooked food left out too long.
• Remove soaked, mouldy gypsum, cardboard and mattresses.
• Wash and disinfect water jars and tanks before refilling; never mix chemicals.
• During spraying, people and pets leave the zone and return at the stated time.
• Watch everyone for several weeks; see a doctor for fever, calf pain, very red eyes, jaundice, severe diarrhoea, muscle stiffness or an inflamed wound.

FAQ: Post-Flood Disinfection in Khlong Ket

The runoff drained quickly. Do we still need spraying?
Silt and water that passed pens and latrines still leave germs on surfaces. Homes with older adults, pregnant women or small children should clean then disinfect before moving back.

Must the silt be removed first?
Yes. Mud stops the disinfectant from reaching the surface.

Should a pregnant woman leave during spraying?
Everyone, including pregnant women, older adults and pets, should leave the zone being sprayed and return at the technicians' time; according to the service information, usually about 30 minutes.

Does spraying prevent tetanus?
No. Tetanus is prevented by vaccination and wound care; see a doctor about any puncture or soil-contaminated wound.

Can WHD serve Khok Samrong?
WHD is in Bang Khae, Bangkok, with no branch in Lop Buri. Book at 065-556-6294 or LINE @whd268; dates depend on the schedule and roads.

Khlong Ket Homes Can Be Safe Again: We Help Prevent and Eliminate Post-Flood Germs

Runoff brings bacteria, viruses and fungi. Once the silt is out, let the WHD team spray with CHEMGENE HLD4H, broad-spectrum according to the product information, before older relatives, pregnant family members and children come home.

Book Post-Flood Disinfection Now

Call 065-556-6294  |  LINE @whd268

World Health Disinfection, Bang Khae, Bangkok 10160. Upcountry bookings by phone and LINE.

Related Links and References

• Disinfection spraying service: https://www.worldhealthdisinfection.com/en/disinfection-service
• CHEMGENE HLD4H: CHEMGENE HLD4H product page
• Residential ozone disinfection: https://www.worldhealthdisinfection.com/en/residential-ozone-disinfection
• Lop Buri Provincial Public Relations Office, Khlong Ket runoff report (25 September 2026): https://lopburi.prd.go.th/th/content/category/detail/id/57/iid/544952
• Government Public Relations Department, DDPM flood summary (data as of 7 October 2026, 06:00): https://www.prd.go.th/th/content/category/detail/id/33/iid/548715
• CDC, Floods: https://www.cdc.gov/floods/
• WHO fact sheets: https://www.who.int/news-room/fact-sheets
• Department of Disease Control, Thailand: https://ddc.moph.go.th/