The Dan Makham Tia Flood, as Reported

According to Bangkok Biz News on 30 September 2026, Ban Tha Khoi, Village No. 2, Klon Do Subdistrict, Dan Makham Tia District, Kanchanaburi, was flooded so deeply that water covered the roofs of houses. Residents evacuated to higher ground. The report attributed the flood to persistent heavy rain combined with releases from the Mae Klong Dam at a rate of 2,184 cubic metres per second, with a forecast peak of around 2,500 cubic metres per second.

In a follow-up report, Bangkok Biz News said that on 6 October 2026 the Department of Disaster Prevention and Mitigation (DDPM) sent Cell Broadcast warnings to mobile phones in Nong Phai Subdistrict and Dan Makham Tia Subdistrict, because water in the Lam Phachi river was continuing to rise.

Nationally, DDPM figures published through the Government Public Relations Department as of 06.00 on 7 October 2026 listed 27 provinces plus Bangkok as affected, covering 123 districts and 984 subdistricts, with 1,154,875 households and more than 3.1 million people affected.

Note: discharge rates, water levels and household counts change daily. Readers should check the latest announcements from Kanchanaburi Province, Dan Makham Tia District and DDPM before travelling back into the area.

What sets this flood apart from urban waterlogging is the terrain. Upland rain runs fast and carries topsoil from fields and forest, and when it recedes it leaves a dense reddish-brown clay silt inside houses that holds moisture for a long time and is home to many soil organisms.

Example Case: A Raised Timber House in Ban Tha Khoi, With Red Mud Up to the Ceiling

Note: the following is an example case written from situations that commonly occur after floods in foothill villages. It is not the verified account of any specific person.

Aunt Boonmee lives in a two-storey timber house on stilts with her husband and two grandchildren. The house is not far from the river. Behind it are a small cattle pen with three cows and a little chicken coop. This year, after days of rain, the village headman told every household to move belongings up high and evacuate.

By the next morning only the tip of the corrugated roof was visible. The family stayed at a hillside evacuation point with dozens of neighbours, sharing toilets and sleeping on mats in tents.

When the water started to fall, Aunt Boonmee and her husband went back to look at the house. Both floors were coated in red mud almost a hand-span thick. Water lines on the timber walls reached the ceiling. The kapok mattresses were so waterlogged they could not be lifted. The food cupboard had toppled over, and among the debris under the house were the carcasses of rats and chickens. A musty smell hung over everything. After a first round of shovelling and hosing, the shaded walls began to show black spots, the youngest grandchild developed an itchy rash, and her grandfather, who had waded barefoot for days, started running a fever with painful calves.

A village health volunteer sent him to hospital to be assessed for leptospirosis and had the child's rash checked. The family then cleaned again more thoroughly, let the house dry, and called in a professional disinfection team before bringing the grandchildren home.

The family had done nothing careless. But floodwater that has run through fields, pens, toilets and forest carries many germs, and plain water alone does not remove them.

Flood Germs in Dan Makham Tia: Know Them Before You Move Back

The Ban Tha Khoi flood combined fast mountain runoff with water backing up from the main river. It was fast, roof-deep, and it flowed through sugarcane and cassava fields, cattle pens, chicken coops, toilets and rubbish heaps before leaving thick silt inside homes. The germs to watch therefore include soil organisms, germs from animal dung and sewage, germs that enter through wounds, and molds that thrive on timber houses that stay wet. Here are ten groups worth knowing.

1. Leptospira, the Cause of Leptospirosis

How it arrives: Leptospira bacteria live in the urine of rats and other animals such as cattle, buffalo, pigs and dogs. When floods cover fields and pens, rats escape upward into houses, ceilings and straw piles, and animal urine mixes into the water and mud across the village.

Where it hides: wet mud under stilt houses, cattle pen floors, earthen yards, straw piles and shaded corners. It prefers damp conditions and can persist in mud for weeks.

Symptoms and who is at risk: it enters through cuts, scratches, skin softened by long soaking, or the eyes and mouth. Symptoms often start within about 2 to 30 days: sudden high fever, headache, muscle pain especially in the calves, and red eyes. Farmers, livestock keepers and anyone shovelling mud barefoot face the highest risk. Anyone with fever after wading should see a doctor promptly and mention the flood exposure.

Prevention: rubber boots and gloves, waterproof plasters, and soap after work.

2. Burkholderia pseudomallei, the Cause of Melioidosis

How it arrives: this bacterium lives in soil and surface water in Thailand. It is most common in the Northeast but is found in other regions too. When runoff strips topsoil from fields and carries it into the village, soil bacteria arrive with the silt that settles inside houses.

Where it hides: thick mud layers on floors, earthen yards, vegetable plots, and shovels, hoes and boots that were not washed after use.

Symptoms and who is at risk: it can enter through wounds, inhaled dust or droplets, or swallowed water. Illness ranges from fever and abscesses to pneumonia. People with diabetes, kidney disease or heavy alcohol use are more likely to become seriously ill. Persistent fever after handling mud warrants a prompt medical visit.

Prevention: wear boots, gloves and a mask when shovelling mud or using high-pressure hoses that throw up spray, keep wounds covered, and wash tools after every use.

3. Clostridium tetani, the Tetanus Germ in Splinters, Nails and Roofing

How it arrives: tetanus spores live in soil and animal dung. Mountain runoff piles up timber, nails, roofing sheets and branches in the village, so cleaning a timber house after a flood carries a real chance of puncture wounds.

Where it hides: debris under stilt houses, soil around cattle pens, loose roofing sheets and mud mixed with construction scraps.

Symptoms and who is at risk: tetanus causes muscle stiffness and spasms, often starting in the jaw, and is a medical emergency. Anyone who gets a nail or splinter wound during cleanup, especially older adults unsure of their vaccination history, should see a doctor about tetanus vaccination.

Prevention: thick-soled boots, leather gloves, never walking barefoot in mud, rinsing wounds with clean water at once, and not delaying a visit to a doctor.

4. Aeromonas, a Freshwater Bacterium That Targets Wounds

How it arrives: Aeromonas occurs naturally in rivers, streams and freshwater ponds. When the main river and the Lam Phachi overflow, freshwater bacteria spread into homes with the water.

Where it hides: puddles around the house, water jars and tanks that were submerged, unwashed containers and surfaces that are still wet.

Symptoms and who is at risk: in wounds it can cause rapid redness, swelling and heat; swallowing contaminated water can cause diarrhoea. People with liver disease, diabetes or weakened immunity are at greater risk.

Prevention: avoid wading with open wounds and scrub water jars before refilling.

5. Campylobacter jejuni from Chicken Coops and Livestock Pens

How it arrives: Campylobacter is common in the gut of poultry and livestock. When coops and pens flood, dung is washed into water that flows through houses, kitchens and wells.

Where it hides: kitchen floors, chopping boards, utensils, back yards next to coops and animal feeders.

Symptoms and who is at risk: diarrhoea, cramping and fever, sometimes with mucus or blood. Young children and older adults dehydrate easily.

Prevention: clean animal and kitchen zones separately and cook food thoroughly.

6. Shigella, the Dysentery Germ from Flooded Toilets

How it arrives: Shigella spreads through human faeces. When water covers roofs, every pit latrine and septic tank in the village is under water, so sewage mixes into the flood. At evacuation points with shared toilets it also passes easily from person to person.

Where it hides: toilet bowls, bathroom floors, water scoops, door handles and unwashed hands. Only a small number of bacteria is needed to cause illness.

Symptoms and who is at risk: fever, cramping and frequent small stools with mucus or blood. Young children in shelters and older adults are most at risk. See a doctor for bloody stools or signs of dehydration.

Prevention: wash hands with soap after every toilet visit, clean bathrooms and shared touch points often, and use safe water for drinking and handwashing.

7. Hepatitis A Virus from Contaminated Water and Food

How it arrives: hepatitis A spreads through faecal contamination of water and food. Many foothill villages rely on wells, village water systems or rainwater stored in jars. When floods reach these sources, the chance of contaminated drinking water rises.

Where it hides: water jars, storage tanks, taps, food containers and the hands of whoever prepares food.

Symptoms and who is at risk: fatigue, loss of appetite, nausea, abdominal pain, yellow skin and eyes, and dark urine. Adults tend to have clearer symptoms than children; people with chronic liver disease should be especially careful.

Prevention: drink boiled or sealed bottled water, throw away food touched by floodwater, wash hands before cooking, and ask a doctor about vaccination if you are in a risk group.

8. Rotavirus, a Diarrhoea Virus Among Small Children at Shelters

How it arrives: rotavirus spreads by the faecal-oral route and survives on surfaces for a long time. When families shelter together on high ground, sharing toilets and belongings, it spreads quickly among young children and can travel home with them.

Where it hides: toys, baby bottles, sleeping mats, stair rails, door handles and floors where babies crawl.

Symptoms and who is at risk: vomiting, watery diarrhoea and fever. Children under five can dehydrate quickly; seek medical care if a child is drowsy, passes little urine or cannot drink.

Prevention: wash hands after nappy changes and disinfect toys and bottles.

9. Dermatophytes and Flood Foot

How it arrives: days of wading and soaking soften the skin on the feet, letting skin fungi and bacteria cause itchy rashes, peeling and cracks between the toes. Shared towels and footwear at shelters help them spread.

Where it hides: boots that never dry, socks, towels, doormats and bathroom floors.

Symptoms and who is at risk: itching, redness, peeling and soggy, smelly skin between the toes. People who wade all day and people with diabetes must watch for secondary infection.

Prevention: dry the feet after every wade, change socks often, dry footwear in the sun, avoid sharing towels, and see a doctor if a rash spreads or produces pus.

10. Molds in Timber Houses: Aspergillus, Penicillium and Black Mold (Stachybotrys)

How it arrives: a timber house submerged to the roof holds moisture deep in its boards, ceiling and roof insulation. If it is opened late or gets little sun, mold spores that are always present in the air begin to grow within 24 to 48 hours, in line with CDC flood cleanup guidance.

Where it hides: shaded timber walls, under floorboards, ceilings, behind wardrobes, mattresses, pillows and piles of damp cloth.

Symptoms and who is at risk: blocked nose, sneezing, coughing and irritated eyes and throat. People with allergies or asthma flare up easily, and people with weakened immunity, such as those receiving chemotherapy, must be careful about fungal lung infection.

Prevention: discard moldy mattresses and porous materials, dry the house as fast as possible, wear an N95 mask while scrubbing mold, and keep allergy sufferers away until the house is dry, cleaned and disinfected.

This information is general and is not a diagnosis. Anyone with fever, severe diarrhoea, yellow eyes, an inflamed wound or breathing difficulty after a flood should see a doctor or visit the nearest health centre, and always mention flood exposure.

How Cleaning and Disinfection Spraying Reduce These Germs

The World Health Organization (WHO) and the US CDC give the same basic advice: surfaces contaminated by floodwater should be cleaned first and then disinfected. Mud shields germs from disinfectant. The right sequence is to shovel out mud, scrub with water and detergent, allow surfaces to dry, and then spray disinfectant across every surface.

According to World Health Disinfection (WHD) service information, the spraying service uses CHEMGENE HLD4H, a medical-grade disinfectant from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. Trained technicians apply it by spraying and/or ULV (Ultra Low Volume) fine-mist fogging so the mist reaches gaps and corners that are hard to wipe by hand.

According to WHD product and service information, the disinfectant is stated to cover a range of viruses, bacteria and fungi, including Salmonella, norovirus, hand-foot-and-mouth virus, RSV, influenza H1N1 and H5N1, mycobacteria and fungi, with the service page stating 99.99% efficacy. For the other organisms in this article, such as Leptospira, Burkholderia pseudomallei, Aeromonas, Campylobacter, Shigella, hepatitis A, rotavirus, dermatophytes and the individual mold genera, WHD does not claim organism-specific test results. They belong to the bacteria, virus and fungi groups the product says it covers. If you need test data for a particular organism, ask the WHD team directly.

For tetanus spores, the best protection is proper footwear, wound care and vaccination as advised by a doctor. Disinfection spraying is one part of reducing germs on household surfaces and never replaces medical care.

Why Shovelling and Hosing Alone Are Not Enough in Dan Makham Tia

Water removes dirt but does not kill germs. Hosing clears mud, but germs stay in wood grain, tile joints and concrete, and the rinse water itself may come from sources that are not fully clean yet.

Bleach is awkward in timber homes. It stains wood, corrodes metal and smells strong, and mixed with some bathroom cleaners it can release dangerous gas. Many households end up using it unevenly or at the wrong strength.

Fans and sun dry surfaces, not hidden spaces. Under floorboards, above ceilings and behind cupboards stay damp even when the outside looks dry, so mold keeps growing.

WHD's Post-Flood Disinfection Spraying Process for Homes in Dan Makham Tia, Kanchanaburi

WHD is based in Bang Khae, Bangkok 10160. For provinces such as Kanchanaburi, the team arranges each job and its travel by phone or LINE. There is no local branch, and same-day arrival cannot be promised. The main steps are:

1. Survey and assessment: send photos, floor area, number of rooms and post-flood condition via LINE @whd268 or call 065-556-6294. The team assesses whether the house is ready for spraying.
2. Mud removal and washing first: the owner or a cleanup crew removes mud, rubbish and soaked materials, washes surfaces and lets them dry as far as possible, because disinfection works best on clean surfaces.
3. Zoning: technicians divide the property into zones such as the space under the house, bedrooms, kitchen, bathroom and animal pen, so nothing is missed.
4. Spraying: according to service information, technicians spray and/or ULV-fog with CHEMGENE HLD4H. People and pets must leave each zone while it is being treated.
5. Waiting and re-entry: according to service information, wait about 30 minutes before using the space normally, always following the re-entry time the technicians give on the day.

WHD does not claim the product leaves no residue. Anyone who feels unwell should see a doctor as well.

10 Reasons Foothill Homes in Kanchanaburi Should Be Disinfected After the Flood

1. Mountain runoff brings soil from fields and forest along with soil bacteria, so surfaces need germ reduction after the mud is gone.
2. Cattle pens, coops and houses sit side by side, so germs from dung enter homes easily.
3. Every pit latrine was under roof-deep water, spreading sewage across the village.
4. ULV fine-mist spraying reaches wood joints, the space under the house and ceilings better than hand wiping.
5. Timber holds moisture for a long time; reducing germs after cleaning helps lower the chance of mold returning.
6. Children coming back from shelters may carry diarrhoea viruses, so toys and bedding deserve disinfection.
7. Older residents with chronic illness need an extra-clean home.
8. CHEMGENE HLD4H is a medical-grade disinfectant used in hospitals and public buildings, according to service information.
9. According to service information, the space can be used again after about 30 minutes, so families do not have to stay away for long.
10. Trained technicians plan zones and spot risk areas owners often overlook.

Before and After Disinfection: A Post-Flood Home in Ban Tha Khoi

Recovery Checklist for Flooded Homes in Dan Makham Tia

Before going back

• Follow announcements from Dan Makham Tia District and DDPM, especially if you have received a Cell Broadcast alert.
• Have an electrician check the wiring before switching anything on.
• Prepare rubber boots, rubber gloves, N95 masks, goggles and waterproof plasters.

During cleanup

• Remove all mud; throw away moldy mattresses, pillows and soaked porous materials.
• Discard food, medicines and cosmetics that touched floodwater.
• Scrub water jars and tanks before refilling them.
• Open doors and windows and use fans to speed drying.

After spraying

• Re-enter at the time the technicians give.
• Wash hands often and drink safe water.
• See a doctor promptly for fever, calf pain, severe diarrhoea or an inflamed wound.

FAQ: Post-Flood Disinfection in Kanchanaburi

Q: Can WHD take a job in Dan Makham Tia?
A: WHD is based in Bang Khae, Bangkok. Upcountry jobs are arranged case by case through 065-556-6294 or LINE @whd268, depending on the schedule and road conditions. There is no local branch and no same-day guarantee.

Q: Do I need to clean before spraying?
A: Yes. Spraying comes after mud removal and washing, because mud shields germs from the disinfectant.

Q: When can we go back in after spraying?
A: According to service information, after about 30 minutes, but always follow the time the technicians give. People and pets leave each zone during spraying.

Q: If the house is sprayed, do we still need a doctor?
A: Yes. Spraying reduces germs on surfaces; it does not treat illness. Anyone with symptoms after wading should see a doctor.

Q: Does the disinfectant kill Leptospira?
A: Leptospira is a bacterium, which falls within the groups the product states it covers, but WHD does not claim a specific test result for it. Ask the team if you need test documentation.

Ban Tha Khoi Can Be Home Again: Many Kinds of Flood Germs, and We Help Prevent and Eliminate Them

Whether it is soil and dung bacteria, diarrhoea viruses brought back from shelters, or mold buried in timber walls, the right approach is to clean thoroughly and then let a professional team reduce germs across every surface. WHD's disinfection spraying service uses CHEMGENE HLD4H, described as a broad-spectrum disinfectant covering viruses, bacteria and fungi, to help families in Dan Makham Tia move back home with confidence.

Book Post-Flood Disinfection

Call 065-556-6294 | LINE @whd268

Related Links and References

• World Health Disinfection: Disinfection Spraying Service
• CHEMGENE HLD4H disinfectant
• Residential Ozone Disinfection for musty post-flood air
• Bangkok Biz News: Ban Tha Khoi, Klon Do, Dan Makham Tia flooding (30 Sep 2026)
• Bangkok Biz News: DDPM Cell Broadcast for Nong Phai and Dan Makham Tia (6 Oct 2026)
• Government PR Department: flood situation, DDPM data as of 7 Oct 2026
• CDC: Floods
• WHO Fact Sheets
• Department of Disease Control, Thailand