A typical scenario (an illustrative example, not an interview with any resident)

Ann runs a small grocery on the ground floor of a three-storey shophouse in Prachinburi town. Three generations live upstairs: her mother in her seventies, Ann and her husband, and their primary-school daughter. Every rainy season she is used to an hour or two of water outside the shop. This year was different. The water on the road kept rising until sedans stopped driving past, and then it started to seep under the roller shutter.

The couple carried bottled water, rice sacks and a small freezer upstairs, but the steel shelving, the wooden counter, a filing cabinet and the lowest rows of stock were too heavy. They sat underwater for days while the family lived on the upper floors. Every time Ann went down the stairs, a smell of murky water mixed with drain odour rose to meet her.

When the water dropped enough to walk, she shovelled out the mud, hosed the floor and left the door open all day. Almost a week later the shop still smelled stale. Small black dots appeared on the back wall along the old waterline. Her mother began coughing at night, and a few regular customers stepped in and asked whether the shop was really open again, because it still smelled of the flood.

This is not one shop's story. It is a pattern seen in many shophouses and homes along town roads where water stands for days. The visible problem ends when the mud is gone. The invisible one, made of germs, mold spores and odour molecules, stays in the building and in the indoor air.

Where the Flooding Hit in Prachinburi Town: Facts From News Reports

The details below come from Thai PBS, 3 October 2026 (thaipbs.or.th/news/content/559069). Water levels and passable routes change every day, so always check the latest local announcements before travelling.

• Rat Damri Road, Mueang Prachinburi: water 70 to 90 cm deep.
• Thesaban Damri Road: about 90 cm, impassable for small cars.
• Town streets in the riverside market area: standing water of about 1 m, traffic prohibited.
• Highway 3079, Prachinburi to Si Maha Phot: water 1.30 m deep with a strong current.

Nationally, the Department of Disaster Prevention and Mitigation reported on 4 October 2026, via Thai PBS (thaipbs.or.th/news/content/559135), that flooding continued in 27 provinces plus Bangkok, covering 154 districts, with 1,171,165 households and 3,262,676 people affected, and warned of renewed heavy rain from 4 to 7 October. These figures reflect the reporting date and are revised daily.

What these facts tell us is that the water in Prachinburi town did not pass through quickly. It sat on the main roads at a height that easily flows into ground-floor shops and homes whose floors are at or below street level. Water at 70 cm to 1 m means power sockets, lower cabinets, low beds, sofas and the lower part of every wall were submerged. With Highway 3079 under 1.30 m of fast water, getting between town and Si Maha Phot became difficult, so moving goods, calling tradespeople and starting the clean-up all took longer. The longer a building stays shut, the longer moisture builds up inside it.

What Standing Street Water Leaves Inside Prachinburi Shophouses

Prachinburi town sits on the Prachinburi River. Its older streets and market area are lined with two- to four-storey shophouses: a shop, restaurant, workshop or storeroom on the ground floor and living quarters above. This building type has particular weak points when water stands for days.

First, street floodwater is not clean rainwater. It has passed through drains, manholes, bins, wet markets and places where animals live, carrying sewage, food waste, animal urine and road chemicals into buildings. When it recedes, much of that stays behind as a thin film of silt on floors, tile joints, skirting and the gaps behind furniture.

Second, masonry and finishes soak up water. Rendered brick walls wick moisture well above the actual waterline. Plywood, parquet, gypsum board and wallpaper hold water inside even when the surface looks dry, and they can stay damp for weeks. That is exactly what mold needs.

Third, shophouses are hard to ventilate. Most have windows only at the front and back, so middle rooms get little airflow. During the flood, roller shutters stay down for security or to slow the water. Humid air lingers, and musty and drain odours soak into curtains, mattresses and upholstered furniture.

Fourth, shops and eateries hold contamination-sensitive items. Shelving, display fridges, chopping boards, utensils and food preparation areas can pass flood germs to food and customers if they are not cleaned thoroughly. Shops in the riverside market area, where water reached about a metre, need a more careful recovery than an ordinary home.

Every Kind of Germ the Prachinburi Flood Brings: Bacteria, Viruses, Mold and Odour

Many people think only of skin rashes or athlete's foot after a flood, but urban floodwater brings several groups of germs at once. The World Health Organization, the US CDC and Thailand's Department of Disease Control all stress waterborne illness and breathing problems linked to damp and mold after floods.

1. Bacteria from sewage and waste

E. coli lives in human and animal intestines. When floodwater pushes sewage up from drains, E. coli travels with it into homes, and some types cause severe diarrhoea and stomach cramps. Salmonella causes food poisoning with diarrhoea, fever, nausea and vomiting, especially when dishes, boards or prep surfaces touched floodwater and were not cleaned properly.

Leptospirosis is caused by Leptospira bacteria in the urine of rats and other animals. Towns with markets and food sources tend to have many rats, and in a flood they climb to higher ground while their urine contaminates the water. The bacteria enter through cuts, skin softened by long soaking, or the eyes and mouth. Typical signs are sudden high fever, headache, strong muscle pain, especially in the calves, and red eyes. Anyone who waded through water on Rat Damri Road or in the market area and develops these signs within one to two weeks should see a doctor immediately and mention the wading.

2. Viruses that spread when people crowd together

Norovirus and rotavirus cause diarrhoea and vomiting and spread easily through hands, surfaces and contaminated food. Rotavirus is common in young children, while norovirus moves quickly through families sharing a bathroom. During floods many households take in relatives or stay with others, which raises the risk.

Respiratory viruses such as RSV and influenza thrive in the rainy season, in damp air, closed rooms and crowded living. Young children and older adults who stay upstairs for days, short on sleep and under stress, catch infections more easily.

3. Mold on walls and furniture

Mold needs only moisture, warmth and organic material such as wood, paper, fabric and dust. CDC flood clean-up guidance advises cleaning and drying within 24 to 48 hours to limit mold. In a shophouse where water stood on the street for days and access was difficult, that window is almost impossible to meet. Mold starts growing before the water even leaves, releasing spores that trigger allergies, sneezing, blocked noses, lingering coughs and asthma flare-ups.

4. Musty and sewage odours

Post-flood odour comes from several sources together: compounds released by mold, decaying organic matter in the silt, drain smells and odour absorbed into fabrics and porous materials. Smell is not just a nuisance. It signals remaining moisture or contamination. For a shop or restaurant, it also directly shapes how customers feel.

Who is most at risk

Take extra care with older adults, young children, pregnant women, people with diabetes, heart, kidney or lung disease, allergy and asthma sufferers, and anyone with weak immunity. In multi-generation shophouses these people are often at home all day, so they breathe more spores and odour than family members who go out to work.

The Impact on Households and Shops in Prachinburi Town

Health. Common complaints after the water recedes are itchy rashes, sore feet, diarrhoea, coughing, sneezing and allergy flare-ups. Some people sleep in a musty room and wake with a headache or sore throat. Left alone, these small problems add up and affect school, work and rest for the whole family.

Money. A shophouse where mold is left on the walls may need re-rendering, new wallpaper, replacement plywood furniture and new mattresses. Repair costs balloon compared with a step-by-step recovery done early. Stock that was soaked, or stored in a musty room, may become unsellable.

Time. Many families spend weeks washing, scrubbing and drying. Shops stay closed or half open. With routes like Highway 3079 still under deep, fast water, bringing in equipment or tradespeople takes longer too.

Customer trust. Restaurants, cafes, groceries and clothing shops near the riverside market rely on neighbourhood regulars. If a customer walks in and smells damp or sees mold stains, confidence in cleanliness drops at once. Reopening means the shop must both look clean and smell clean.

Family wellbeing. Living in a home that still smells of the flood makes it feel as if the event is not over. Older relatives sleep badly, children avoid their bedrooms, parents worry every time someone coughs. A clean, odour-free home helps everyone get back to normal sooner.

Why the Usual Fixes Fall Short

Wiping surfaces with bleach only. Diluted bleach helps on hard, already-cleaned surfaces, but it cannot reach germs in the air, in porous render, behind cabinets, under counters or inside fabric. Mixed with some bathroom cleaners it can release dangerous gas, so follow the label and ventilate.

Running fans alone. Fans dry surfaces faster, but in a room that already has mold they can spread spores everywhere, and they do not destroy germs or odours.

Air freshener. Fragrance masks odour briefly, but the source molecules remain. When the scent fades, the mustiness returns, and some people react to the fragrance itself.

Painting over mold. A common mistake in shophouses, because owners want the shop to look new quickly. If the wall is still damp and mold lives inside, the new paint blisters and black stains return within weeks.

Closing the room to let it dry. A sealed room in the rainy season gets damper and mustier. Ventilate, use a dehumidifier if possible, and disinfect once the room is dry.

Ozone Disinfection in Prachinburi With WHD: How It Works After Cleaning and Drying

World Health Disinfection (WHD) provides residential and building ozone disinfection for homes, condos, shophouses, shops, offices, hotels, factories, schools and healthcare facilities. WHD is based in Bang Khae, Bangkok, and has no branch in Prachinburi. Customers in Prachinburi town contact the team by phone at 065-556-6294 or LINE @whd268 to plan the job, assess the space and confirm a travel date. Same-day arrival cannot be promised, especially while routes are still flooded.

How it works. Ozone (O3) is a molecule of three oxygen atoms with strong oxidising power. As it spreads through a room, it breaks down the cell walls of bacteria, the outer layers of viruses and mold spores, and splits odour molecules. It then reverts to oxygen (O2), leaving no chemical residue. According to the test results certified for the company by Thailand's Department of Medical Sciences and Intertek (UK), it eliminates viruses, bacteria and mold by 99.99%. See the certificates.

Why a gas suits shophouses. A gas reaches places cloths and sprays cannot: behind shelving, under counters, inside cabinets, above ceiling boards and in the stale air of windowless middle rooms. That makes ozone a finishing step after mud removal, scrubbing and drying.

1. Assessment from photos or video on LINE, including the old waterline, room sizes and dampness.
2. Preparation: people, pets and plants leave the room; doors and windows are closed.
3. Ozone is released to the right concentration and held for the contact time.
4. The room rests and is ventilated so ozone reverts to oxygen before anyone re-enters.
5. Repeat zone by zone; a typical cycle is about 30 minutes per zone, depending on size and condition.

Key rule: ozone treatment is done only in an empty, closed space. No people, pets or plants inside during treatment, and re-entry only after the rest and ventilation period the team advises. Ozone comes after mud removal, washing and drying. It does not replace cleaning and it does not replace medical care. Anyone with fever, calf pain, diarrhoea or other symptoms after wading must see a doctor.

For areas that need extra care, such as food prep zones, the team can also recommend disinfection services or medical-grade products such as Chemgene. Current promotion: ozone jobs from 15,000 baht receive a free medical-grade disinfectant spray.

When to Treat, With More Heavy Rain Forecast

With renewed heavy rain warned for 4 to 7 October 2026, shophouse owners on Rat Damri Road, Thesaban Damri Road and in the market area ask whether to treat now or wait. The safe answer is to follow the order and skip nothing.

• While water stands: focus on safety, switch off ground-floor power, move valuables up, avoid wading. Not the time for ozone.
• Just after it recedes: remove mud, discard soaked items, wash surfaces, ventilate, and have an electrician check the wiring.
• Drying: open doors and windows, use fans and dehumidifiers until surfaces are dry and the standing-water smell fades.
• Disinfection and odour removal: once clean and dry, treat with ozone zone by zone.

If new rain floods the building again, earlier treatment is wasted. Send photos for assessment first, then book the actual date once you are confident the water will not return.

10 Reasons Prachinburi Shophouses and Homes Should Consider Ozone After the Flood

1. Reaches every corner, including behind shelves, under counters and inside cabinets.
2. Handles several germ groups in one cycle: bacteria, viruses and mold, per the company's certified tests.
3. Removes musty and drain odours at the source rather than masking them.
4. No chemical residue, since ozone reverts to oxygen. See ozone and chemical residue.
5. Helps shops reopen with confidence, without the smell of the flood greeting customers.
6. Reduces airborne mold spores, a key allergy trigger for older adults and children.
7. Short cycles, about 30 minutes per zone, planned floor by floor.
8. Suits poorly ventilated shophouses, reaching stale middle rooms. See the ozone service.
9. Completes the cleaning you already did, as a final step after washing and drying.
10. Advice before booking: send photos to LINE @whd268. Ask about ozone in Prachinburi.

Before and After a Step-by-Step Recovery

Example Case: A Three-Storey Shophouse Near the Riverside Market

An illustrative example of the recovery order, not a review from any customer.

Ton owns a three-storey shophouse in the market area, with a kitchenware shop downstairs and bedrooms above. Water stood about a metre deep outside for several days. Afterwards he followed the order: photographing the damage, switching off ground-floor power, shovelling out mud, throwing away swollen cartons and plywood shelves, washing floors and walls with clean water and detergent, then opening the front and back and running a dehumidifier for several days.

When the walls were drying but the mustiness remained, he sent photos and video on LINE. The team suggested three zones: the shop front, the back stockroom and the second-floor bedroom above the shop. On the day, the family waited at a nearby cafe and took their cat with them. Each zone was treated, rested and ventilated before anyone returned.

Afterwards, he noticed the stockroom smell had clearly dropped and the bedroom no longer smelled of floodwater at night. He also decided to wait until the walls were fully dry before repainting, instead of painting straight over as he had first planned.

Recovery Checklist for Prachinburi Town: Before and After Ozone

Before ozone

• Wait until the water recedes and authorities say it is safe to return.
• Wear boots, rubber gloves and a mask while cleaning; wash hands often.
• Switch off power and have the wiring checked before use.
• Remove mud and discard soaked items that cannot be cleaned: mattresses, cartons, swollen plywood.
• Wash surfaces with clean water and detergent, especially food prep areas.
• Throw away food and drinks that touched floodwater.
• Ventilate and dry the room with fans and dehumidifiers.
• Remove valuables, documents and usable food, or seal them in boxes.

On the day

• Everyone, pets and plants leave the zone being treated.
• Close doors and windows and follow the team's instructions.
• Re-enter only when told the rest and ventilation period is over.

After ozone

• Keep ventilating and keep indoor humidity low.
• Watch walls and corners; new mold means a moisture source remains.
• Repaint or repair only when walls are fully dry.
• If anyone has fever, calf pain, diarrhoea or breathing trouble, see a doctor.

FAQ: Ozone Disinfection After the Prachinburi Town Flood

Does WHD have a branch in Prachinburi?
No. WHD is based in Bang Khae, Bangkok. Customers in Prachinburi call 065-556-6294 or message LINE @whd268 to plan the job and confirm travel. Same-day arrival is not guaranteed.

Can I treat right after the water recedes?
Not recommended. Remove mud, wash and dry first. Ozone is the finishing step.

Can we stay inside during treatment?
No. The room must be empty of people, pets and plants. In a multi-storey shophouse, floors can be treated one at a time while the family waits on an untreated floor, if the team advises it is suitable.

How long does it take?
Usually about 30 minutes per zone, plus preparation and rest time. The number of zones depends on the building.

What does ozone eliminate?
According to the company's certified test results, viruses, bacteria and mold by 99.99%, and it breaks down odour molecules.

Someone got sick after wading. Will ozone help?
Ozone improves the indoor environment but does not treat illness. High fever, calf pain, red eyes or diarrhoea need a doctor promptly.

Is there a promotion?
Ozone jobs from 15,000 baht receive a free medical-grade disinfectant spray.

Plan Ozone Disinfection for Your Prachinburi Shophouse or Home

Send photos of the rooms and the old waterline for assessment, then book once the space is clean and dry.

See the Ozone Disinfection Service

Phone 065-556-6294  |  LINE @whd268  |  worldhealthdisinfection@gmail.com

Related Links and References

• Ozone cleaning service
• Ozone disinfection machines
• Contact us
• Thai PBS (3 Oct 2026): flooding on Prachinburi town roads
• Thai PBS (4 Oct 2026): national flood situation per DDPM
• CDC: Floods and cleanup safety
• WHO fact sheets
• Department of Disease Control, Thailand

Note: figures and water conditions are as of the dates cited and change daily.