A typical scenario (an illustrative situation drawn from common post-flood experiences, not a review from any specific customer)

Grandma's under-house space in Prakhon Chai, once the heart of the family

Grandma Boonma's home in Prakhon Chai is a traditional Isan wooden house raised on stilts. The open space beneath it is where the family really lives: a bamboo platform where the grandchildren nap, a cloth hammock, the loom she uses to weave silk for sale in the village, sacks of unmilled rice brought down from the granary, and jars of fermented fish that last the family all year.

Days of heavy rain sent water from the surrounding rice fields into the village, and it pooled under the house almost knee-deep for several days. Her son struggled to lift the loom upstairs. Some rice sacks were soaked and had to be thrown away. When the water finally drained, the ground beneath the house was left with a thick layer of sticky brown mud and a sour smell mixed with wet rice and manure from the cattle pen next door.

The family shoveled out the mud and hosed down the posts and ground, but the smell kept rising into the upstairs bedrooms through the gaps in the floorboards. Within two weeks, her three-year-old grandson had diarrhea twice, Grandma developed a dry morning cough, and the silk rolled up in a wooden chest had sprouted mold spots, even though the chest never touched the water. Moisture evaporating from below had done the damage.

Similar stories play out across Buriram villages. The raised-house design that helps families cope with seasonal floods can, after the water drops, turn the under-house area into a large reservoir of moisture and germs sitting directly beneath everyone's bedroom.

Buriram floods 2026: Nang Rong and Prakhon Chai in the national picture

According to the DDPM report of 2 October 2026, flooding affected 31 provinces plus Bangkok, with 1,245,581 households, or 3,535,206 people, affected nationwide. The main causes were heavy to very heavy rain together with runoff from the north. In Buriram, the report listed affected areas in Nang Rong and Prakhon Chai districts, totaling 3,164 households, with water levels decreasing.

Both districts lie in the southern part of the province, a landscape of wide rice fields growing jasmine rice, sugar cane and cassava, crossed by many streams and tributaries. Homes range from wooden stilt houses and half-timber, half-concrete houses to single-storey concrete village homes and shophouses in the district towns. Nang Rong is a busy market town and a gateway for visitors heading to Phanom Rung, while Prakhon Chai is home to the Prasat Muang Tam sanctuary, so both have their share of restaurants, souvenir shops and small homestays.

3,164 households may sound modest, but rural Isan homes often hold three generations under one roof: grandparents, parents and small children. That means many people are moving back into freshly flooded houses, and a high share of them belong to vulnerable groups.

Know the flood germs in Buriram before you move back in

Floodwater in the villages of lower Isan does not come from rain alone. It flows across rice fields, through cattle and buffalo pens, chicken coops, cesspits, septic tanks and rubbish heaps before settling under your house. WHO and the CDC share one principle: treat every surface that touched floodwater as contaminated until it has been cleaned and disinfected. Here is what to watch for.

Leptospirosis: a special concern for Isan rice farmers

The Northeast has long been a focus of leptospirosis surveillance by Thailand's Department of Disease Control, because so many people farm rice and wade through water and mud as part of daily life. During floods, rats from the fields and granaries move into homes, and urine from infected rats carries Leptospira bacteria into water and mud. The bacteria enter through foot wounds, scratches or skin softened by soaking. Symptoms usually appear within one to two weeks: sudden high fever, headache, muscle pain especially in the calves, red eyes, and sometimes jaundice or reduced urine. If you develop these after wading or cleaning up, go to hospital and tell the doctor about the exposure. Do not self-medicate.

Melioidosis: a soil and water germ every Isan family should know

Another disease found in the Northeast, especially in the rainy season, is melioidosis, caused by bacteria that live in soil and water. It enters the body through wounds in contact with mud, or through inhaling contaminated water droplets. People with diabetes or kidney disease are at higher risk. It can cause prolonged fever, abscesses or pneumonia. Wearing boots and gloves while shoveling mud matters, and a fever that will not go away needs a doctor.

Fecal bacteria from people and animals, such as E. coli

Many rural homes keep cattle, chickens or other animals close to the house. When pens and cesspits flood, fecal bacteria such as E. coli and Salmonella spread with the water and settle on house posts, under-house platforms, water jars and kitchen utensils. Children who play under the house and then eat snacks with their hands are at real risk of diarrhea.

Diarrhea viruses such as norovirus and rotavirus

These viruses travel through hands, food and contaminated drinking water, and spread quickly through large families, especially when water jars or village water sources are contaminated. Young children with rotavirus can become severely dehydrated. Watch for lethargy and reduced urine, and see a doctor immediately.

Mold in wood, silk and stored rice

Wooden houses, handwoven cloth, kapok mattresses and unmilled rice all absorb moisture readily. If they are not dry within 24 to 48 hours, molds such as Aspergillus and Penicillium begin to grow and release spores into the air, setting off allergies and asthma. Rice and dried food that were soaked by floodwater should not be eaten or fed to animals, because some molds produce toxins you cannot see.

Musty odor and stagnant-water smell from under the house

The smell rising from beneath a raised house after a flood comes from fermenting mud, plant debris, manure and microbes breaking down organic matter in still, damp air. It soaks into the floorboards above and leaves entire bedrooms smelling stale. Closing windows at night to keep mosquitoes out only makes it build up.

Who should be most careful

Older adults, young children, pregnant women, people with diabetes, kidney or heart disease, people with allergies or asthma, and anyone with cuts on their hands or feet should avoid shoveling mud themselves and wait until the house has been cleaned, dried and disinfected before sleeping there again.

What Buriram families stand to lose if the problem is left alone

The health of three generations: When one person in the house gets diarrhea or an allergy flare-up, others usually follow. Older relatives with chronic conditions may end up in hospital, and children working in the city must take leave to come home and care for them.

Paying twice: Many families have already lost part of this season's rice. Throwing away mattresses, blankets, silk or furniture because of mold, or replacing floorboards that rotted from damp, makes the financial burden much heavier.

Time that belongs to the fields: After the water drops, rice paddies and livestock need attention. Returning again and again to scrub mold and wash the under-house area delays farm work.

Tourism and trade income: Restaurants, souvenir shops and homestays in Nang Rong and Prakhon Chai rely on visitors to the sanctuaries. A musty room means a guest who will not return and an online review that stays up for years.

Family heritage: Handwoven silk, old sarongs and heirlooms passed down through generations can be ruined for good by mold, a loss no money can replace.

Why hosing down and wiping the old way does not finish the job

Hosing the under-house area only: It pushes mud away but adds fresh moisture to soil and wooden posts. Without sun or wind to dry them, mold grows even faster.

Spreading lime or pouring bleach on the ground: This helps somewhat on soil and concrete, but does nothing for germs and odors that have soaked into floorboards, walls and furniture upstairs. Overly strong solutions in enclosed spaces can also irritate the lungs.

Incense, citronella or deodorizing sprays: These cover the smell briefly while the source remains, and smoke or fragrance can make older people with lung problems cough more.

Sunning bedding for a day or two: Sunlight genuinely helps, but at the tail end of the rainy season it is weak and unreliable. Kapok mattresses soaked with dirty water often dry only on the surface and stay damp inside.

Painting or wallpapering over stains: In concrete village houses and town shophouses, people often paint over water and mold stains. The paint peels and mold reappears within weeks.

The right order is to remove mud and damaged items, wash, disinfect surfaces, dry as thoroughly as possible, and then add ozone treatment as a supporting step to tackle germs and odors in the air, in wood grain and in spots that wiping cannot reach.

WHD ozone disinfection for homes, shops and homestays in Buriram

WHD (World Health Disinfection) is a disinfection company based in Bang Khae, Bangkok 10160. It offers residential and building ozone disinfection for houses, condos, hotels, offices, factories, schools and hospitals. The company has no branch in Buriram, but residents of Nang Rong, Prakhon Chai and other districts can contact the team to plan a service. Travel and coverage are confirmed by phone at 065-556-6294 or LINE @whd268. Visit dates depend on the job queue and distance, so same-day arrival cannot be promised.

How ozone works

Ozone (O3) is a gas made of three oxygen atoms with a strong oxidizing effect. Released in a closed space, it spreads throughout and slips into floorboard gaps, cabinet corners, cloth chests and room corners. It breaks down bacterial cell walls, viral shells and mold spores, and splits odor-causing molecules. Afterwards it reverts to oxygen (O2), so no chemical residue remains on fabric, mattresses or kitchenware. According to test results certified for the company by Thailand's Department of Medical Sciences and Intertek (UK), the system eliminates viruses, bacteria and mold by 99.99%. See WHD's certification documents for details.

Service steps

1. Talk it through first: Share the size of the home, number of rooms and type of house, such as a stilt house or concrete house, and send photos on LINE.
2. Readiness check: The home should already have had mud removed, been washed and dried to a suitable level.
3. Empty the space: People, pets, plants and any penned animals right next to the house must be moved away. Doors and windows are closed.
4. Zone-by-zone treatment: Ozone is released and left to act, typically about 30 minutes per zone.
5. Rest and ventilate: The ozone breaks down and the space is aired as the team specifies before anyone goes back in.
6. Aftercare advice: How to manage moisture under the house and inside rooms to reduce the chance of mold returning.

Safety comes first: ozone treatment is only carried out in a closed space with no people, pets or plants inside, and re-entry happens only after the rest and ventilation period. Ozone follows cleaning and drying. It does not replace washing the house, and it does not replace seeing a doctor if you fall ill.

Learn more about the ozone cleaning service and Chemgene disinfectant, which can be used for surface disinfection.

10 reasons homes in Nang Rong and Prakhon Chai should consider ozone after the flood

1. Stilt houses are full of gaps. Ozone gas reaches into floorboard joints and wall panels far better than wiping.
2. It cuts the smell that rises from below into bedrooms by breaking down odor molecules instead of masking them.
3. It reduces several germ groups together. Bacteria, viruses and mold, at 99.99% according to the company's certified tests. Read more on the WHD ozone service page.
4. No residue on silk or bedding, because ozone reverts to oxygen.
5. Suits homes with older adults and toddlers, the typical shape of many Isan households.
6. Reduces mold spores in cloth chests and wooden cabinets that stay closed and stuffy after floods.
7. Helps homestays and restaurants near the sanctuaries reopen with confidence and avoid complaints about room odor.
8. About 30 minutes per zone, so there is no need to move out for days.
9. The team manages safety at every step, from sealing the area to setting the re-entry time. Ask questions on the ozone disinfection page.
10. Cheaper than throwing things away and rebuilding, plus a free medical-grade disinfectant spray for ozone jobs of 15,000 baht or more.

Side by side: a Buriram home before and after ozone

Results depend on cleanliness, dryness and continued humidity control. If water still pools under the house or the ground stays soggy, fix drainage as well.

Example case: a family homestay in Nang Rong

Example case (a simulated scenario to explain the process, not a real customer review)

Ann came home from Bangkok to help her parents run a small homestay in Nang Rong. It has five bedrooms in a single-storey concrete building at the front and an old wooden house at the back used as a dining and lounge area. Most guests are travelers driving to Phanom Rung and Prasat Muang Tam.

During the heavy rain, water from the fields behind the property pooled about a hand-span deep across the grounds, entered the two lowest bedrooms and filled the space under the wooden house. The family closed to guests immediately, threw out two soaked mattresses, washed the tiled floors, wiped bed and table legs with disinfectant and ran fans day and night for almost a week.

When they reopened, one of the first guests wrote that the room was lovely but smelled like damp laundry. Ann noticed the odor was strongest in the built-in wardrobes and in the wooden house, where water had stood underneath. She contacted WHD on LINE and sent photos and a rough floor plan.

The team asked follow-up questions, confirmed the distance and booked a date from the queue. On the day, the family took their dog and cat to a neighbor, moved potted plants outside and opened every wardrobe and drawer. The team split the property into a front guest-room zone and a rear wooden-house zone, treated each in turn, then allowed the full rest and ventilation period before the family went back in to check.

Ann found the musty smell in the wardrobes and the wooden house had dropped clearly, and the guest rooms smelled clean and neutral again. The team advised improving drainage at the back so water would not pool under the house again, and running a dehumidifier in the flooded rooms for a while longer so the results would last.

Flood recovery checklist for Buriram households

Before going in

• Check the electrics, especially sockets and wiring running under the house. If they were submerged, have an electrician inspect them first.
• Wear rubber boots, gloves and a mask, and cover cuts on hands and feet to guard against both leptospirosis and melioidosis.
• Watch for snakes and other venomous creatures sheltering in woodpiles, sack stacks or under platforms.
• Photograph damage to the house, rice and belongings for relief claims.

While cleaning

• Shovel out as much under-house mud as possible, then wash posts, platforms and concrete with detergent.
• Separate any unmilled rice, milled rice or dry food that was soaked, and do not eat it or feed it to animals.
• Discard kapok mattresses, futons and pillows soaked in dirty water that cannot be dried.
• Clean water jars and storage containers; use boiled or bottled water until the source is safe.
• Disinfect hard surfaces, tables and kitchen counters following label directions, and never mix products.
• Open the house to air and use fans so the under-house area and floorboards dry within 24 to 48 hours if possible.

On ozone day

• Everyone, every pet and every plant leaves the area; move penned animals next to the house farther away.
• Open cloth chests, cabinets, drawers and interior doors.
• Go back in only when the team confirms the ventilation period is over.

After ozone

• Improve drainage so water does not collect under the house again.
• Air silk and woven cloth in shaded, breezy spots and check for mold regularly.
• Clean air-conditioner filters and open windows when the sun is out.
• For high fever, calf pain, red eyes, jaundice, severe diarrhea or a fever that will not break, go to hospital immediately and mention flood exposure.

Buriram post-flood ozone: questions and answers

1. Can WHD travel to Buriram?

WHD is based in Bang Khae, Bangkok and has no branch in Buriram, but you can contact the team to plan a visit. Travel, coverage and dates are confirmed at 065-556-6294 or LINE @whd268.

2. Can a stilt house be treated if the space underneath is open?

Ozone works best in enclosed areas inside the house, such as bedrooms, storerooms and upstairs halls. The open under-house space should be handled by removing mud, washing and letting sun and wind dry it. The team will suggest suitable zones.

3. How long do we need to stay out?

Treatment typically takes about 30 minutes per zone, plus preparation and ventilation time. No people, pets or plants may be in the area during that time.

4. If we use ozone, do we still need to wash the house?

Yes. Mud removal, washing and drying always come first. Ozone is a supporting step for the germs and odors that remain.

5. Will ozone harm silk stored in chests?

Tell the team in advance about valuable fabrics or collectibles so they can decide how to position them or remove them from the area.

6. Can ozone treat leptospirosis?

No. Ozone is for spaces, not bodies. If you have symptoms after wading, see a doctor right away. Disease information is available from the Department of Disease Control.

7. Are there any promotions?

Ozone jobs of 15,000 baht or more receive a free medical-grade disinfectant spray, subject to company conditions.

Make your Buriram home a place of rest for the whole family again

Get advice on post-flood ozone disinfection for homes, shops and homestays in Nang Rong, Prakhon Chai and other Buriram districts. The team is ready to assess and confirm travel.

Talk to WHD About Ozone

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

Related links and references

• Residential and building ozone disinfection (WHD)
• Disinfection services (WHD)
• Contact WHD
• Bangkok Biz News: DDPM flood situation report
• Thai PBS: 2026 flood situation
• CDC: Floods and cleanup
• Department of Disease Control, Ministry of Public Health