The Rayong Flood Situation According to DDPM

According to the Department of Disaster Prevention and Mitigation (DDPM) report of 2 October 2026, Rayong province had affected areas in two districts, Mueang Rayong and Klaeng, with 1,760 households affected and water levels holding steady. This figure reflects the report date and changes daily, so follow the latest DDPM and provincial announcements as well.

Nationally on the same day, DDPM reported flooding in 31 provinces plus Bangkok, with 1,245,581 households or 3,535,206 people affected. The cause was heavy to very heavy rain combined with runoff flowing down from the north. Rayong was one of the eastern coastal provinces affected in the same period.

Rayong holds two worlds side by side. On one side is an industrial province with fast-growing urban neighbourhoods around Mueang district, full of housing estates, townhouses and rental rooms. On the other is Klaeng, which still has fruit orchards, wooden houses, fishing communities and a way of life along the Prasae River, while the Rayong River flows through Mueang to the sea. Each kind of home faces different problems after a flood, but every one of them sits in the same hot, humid, salty sea air, conditions that mold loves.

A typical scenario (an illustrative example based on common situations, not a review from any specific customer)

A Two-Storey Wooden House in Klaeng: The Water Is Not High, but It Will Not Leave

Aunt La-iad, 68, lives in a two-storey wooden house her parents built in Klaeng district. The ground floor is a concrete extension added later and used as a kitchen, dining area and store for garden tools. Upstairs are wooden bedrooms she shares with her granddaughter, a secondary-school student. Her son works at a factory in Mueang district and comes home every evening.

This year the water did not rise very high, just ankle- to mid-shin-deep. What was different from previous years was that it would not drop. It sat in the yard and on the ground floor for days. An oily film formed on the surface and a stale smell like drain mud hung in the air. Aunt La-iad still had to come down to cook rice in the kitchen every day with her feet in the water. The legs of the wooden food cabinet began to swell, the lower wall planks darkened, and the fertiliser bags and sacks in the corner turned to mush.

After a week, her granddaughter developed an itchy rash on the tops of her feet, and a small scrape on Aunt La-iad's shin became swollen and red. Her son worried about infection, and had no idea how to clean this old wooden house once the water dropped without making the timber rot even faster.

The first thing to do here is take Aunt La-iad to a doctor to look at the swollen wound, because wounds soaked in floodwater for a long time are at risk of bacterial infection and leptospirosis. Next, move cooking to a dry place for now, avoid walking through standing water without boots, and plan the recovery in stages once the water starts to fall.

Steady Water in Rayong: Why the Longer It Stays, the More Dangerous It Gets

Many people assume water that is shallow and slow is not much to worry about. From a hygiene point of view, water that stands still for days carries several risks worth understanding.

• Still water turns foul. Without circulation, organic matter, food scraps, animal waste and sewage start to rot. Oxygen in the water drops, producing bad smells and sulphur compounds that smell like rotten eggs.
• Longer soaking means deeper absorption. Timber, plaster, gypsum ceilings and plywood furniture that sit in water for days hold moisture deep inside and are slow to dry. The slower they dry, the more time mold has to grow.
• Skin soaked for long periods softens and breaks easily, opening a route for bacteria and Leptospira.
• Mosquitoes and insects multiply. Standing water is a breeding ground for mosquitoes, which are linked to diseases such as dengue.
• People keep living with the water. Because it is not deep enough to force evacuation, families touch it repeatedly every day without noticing.

So for homes in Mueang Rayong and Klaeng where the water is holding steady, protecting yourself while the water is still there matters as much as restoring the house after it has gone.

Every Germ That Comes With the Rayong Flood, and Who Is Most at Risk

Bacteria: E. coli, Salmonella and Leptospira

Floodwater that passes through communities, drains and septic tanks usually carries gut bacteria such as E. coli and Salmonella, which cause diarrhoea, stomach pain and vomiting and can infect wounds. In areas with orchards, grassland and villages, rats are common, so watch for leptospirosis. The bacteria enter through wounds and skin soaked for a long time. Symptoms are a sudden high fever, headache and muscle aches, especially marked calf pain, and sometimes red eyes. Anyone with these symptoms after wading should see a doctor promptly and mention the flood exposure.

Viruses: norovirus, rotavirus and hepatitis A

These viruses spread through hands that touch contaminated surfaces and through unclean food and drinking water. During a flood, ground-floor kitchens are often splashed or flooded, so plates, bowls, pots and chopping boards become risk points. Young children and older adults with severe diarrhoea can become dehydrated quickly.

Mold: the enemy of seaside wooden homes

Rayong's hot, humid air and sea mist make materials dry more slowly than people expect. Wooden houses, wooden cabinets, mattresses, pillows, clothes and ceilings that soaked up water can grow mold within days. The WHO and CDC advise cleaning and drying within 24 to 48 hours, which is almost impossible when water stands for days, so mold has usually rooted itself in the material already. Mold spores can trigger allergies, asthma, chronic cough and irritation of the eyes and skin.

Odor: from musty damp to stagnant-water stench

The smell in a home after long-standing water often has two layers. The first is a damp, musty smell from mold and bacteria. The second is a stagnant-water and drain smell from sulphur compounds in wastewater that have soaked into wood and plaster. Both are signs that microbes and odor compounds are still present in the house.

Groups at risk

• Older adults who still have to walk through water at home every day and whose wounds heal slowly
• Young and school-age children who like to play in standing water
• Pregnant women, who should avoid contact with wastewater and mold
• People with diabetes, for whom foot wounds can become infected easily and seriously
• People with asthma and allergies, who are sensitive to mold spores
• Orchard farmers and fishers, who regularly work in water and mud

The Price of Leaving Germs in Your Home

Health: repeated illness, infected wounds and allergy flare-ups, especially among older adults who recover slowly.

Property: old wooden houses rot faster if moisture and mold remain. Wooden cabinets, beds and furniture with sentimental value can be permanently damaged.

Time: painting, oiling wood or laying new flooring too early lets mold return, and the work has to be done again.

Reputation and income: for homes that double as shops, guesthouses or restaurants in Mueang Rayong and Klaeng, a musty smell is the reason customers do not come back.

Family: children working elsewhere must take leave to come home and care for older parents, and worry and costs pile up.

Why Familiar Methods Are Not Enough for Rayong Homes

• Pouring bleach on wooden floors can stain and weaken the wood and still does not reach germs deep in the timber. Never mix it with ammonia or other cleaners, as toxic gas forms.
• Sun and fans alone only dry the surface, while sea air and humidity keep the inside of materials damp for a long time.
• Masking smells with incense, perfume or coffee grounds feels better for a while, but the source remains.
• Oiling or painting wood straight away traps moisture and mold under the coating.
• Putting things back into cupboards too soon turns a closed cupboard into a small mold incubator.

The right order is: wait until the water has truly gone, remove mud, wash with clean water and detergent, disinfect surfaces following public health guidance, allow enough drying time, and only then use ozone to deal with germs and odor in the air, corners and material surfaces that cleaning cannot reach.

What WHD Ozone Disinfection Can Do for Rayong Homes

World Health Disinfection (WHD) provides residential and building ozone disinfection. Its office is in Bang Khae, Bangkok, and it has no branch in Rayong, but families and businesses in Mueang Rayong, Klaeng and nearby areas can contact the team to plan a service. Travel and coverage are confirmed by phone or LINE before booking.

Ozone (O3) is a gas with strong oxidising power. Released in a closed room, it works its way into gaps between floorboards, under cabinets, behind furniture, inside open cupboards and across wood, fabric and plaster. It breaks down the cell structures of viruses, bacteria and mold and breaks apart odor molecules such as musty and stagnant-water smells, then reverts to oxygen (O2), leaving no chemical residue on wooden floors or furniture. 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%. Details are on the certificates page.

Service steps

1. Talk and assess: send photos, the number of rooms and the main materials (wooden house, concrete house or townhouse) by LINE or phone.
2. Check readiness: no standing water in the house, mud removed, washed and dry enough.
3. Clear the space: all people, pets and plants out; doors and windows closed; cupboards and drawers open.
4. Ozone treatment: gas release and contact time, typically about 30 minutes per zone.
5. Rest and ventilation: the ozone reverts to oxygen and the space is aired before you return, as the team instructs.

Safety essentials: ozone is used only in a closed, empty space with no people, pets or plants inside. Do not enter during treatment, and return only after the rest and ventilation period. Ozone comes after washing and drying; it does not replace cleaning and is not a medical treatment. Anyone with fever, calf pain, a red swollen wound or diarrhoea after flood contact must see a doctor.

10 Reasons Homes in Mueang Rayong and Klaeng Should Consider Ozone

1. It suits homes where water stood for a long time, where germs and odors soak deeper than in homes where water came and went quickly.
2. It does not stain wooden floors, because no large volumes of chemicals are poured, and there is no residue.
3. It reaches gaps between floorboards and behind wall planks that are hard to wipe. See the ozone service
4. It tackles both musty and stagnant-water odors by breaking down odor molecules rather than masking them.
5. It covers bacteria, viruses and mold in a single step.
6. It is safe to move back in once the rest and ventilation period is complete, because ozone reverts to oxygen.
7. It is quick: about 30 minutes per zone plus rest and ventilation.
8. It is backed by test results certified for the company by the Department of Medical Sciences and Intertek.
9. It works for homes, shops, guesthouses and offices in Rayong town and in Klaeng communities alike. Consult the WHD team
10. Better value: a free medical-grade disinfectant spray with ozone jobs of 15,000 baht or more. Ask about the promotion

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

A Townhouse in Mueang Rayong and a Son With Asthma

Chanpen, an accountant, lives in a two-storey townhouse on a housing estate in Mueang Rayong with her husband and their eight-year-old son, who has asthma. Water stood in the lane and on the ground floor for several days. The family moved upstairs and sent their son to stay with his grandmother while the water held steady.

When the water dropped, her husband and neighbours removed the mud, washed the floors and cut out the lower sections of gypsum wall that had soaked up water. They threw away the fabric sofa and carpet, had an electrician check every socket, and kept doors, windows and fans open for nearly two weeks until the walls and floors were properly dry. Even so, Chanpen did not dare bring her son home: whenever the house was closed for half a day, the musty smell returned, and she feared mold spores would trigger his asthma.

She sent photos and room sizes to WHD on LINE. The team confirmed travel to Rayong and a date, and advised opening every cupboard and drawer and moving houseplants outside. On the day, the family went out on errands. The team treated the ground and upper floors as separate zones, about 30 minutes each, then rested and ventilated before telling the family they could return.

In cases like this, families usually notice a clear reduction in the musty smell when the house is closed and feel more confident about bringing a child home. Even so, a child with asthma should stay under a doctor's regular care, and the family should keep managing indoor humidity, because ozone helps the environment and does not replace treatment.

Checklist for Rayong Residents: While the Water Holds, After It Recedes, and After Ozone

While the water is holding steady

• Cut power to the ground floor and do not use appliances that have been in water.
• Wear boots whenever you walk in water, cover wounds, and wash and dry your feet with soap afterwards.
• Move cooking and food to a higher place; use bottled or boiled water.
• Wash dishes in clean water, never floodwater.
• Turn over containers that could hold water to reduce mosquitoes.

After the water recedes: mud and washing

• Have an electrician check the wiring before use.
• Remove all mud from the house, the space under raised floors and the yard.
• Wash floors, walls and hard furniture with clean water and detergent, then disinfect surfaces as advised.
• Throw away mattresses, pillows, carpets, sacks and anything that has turned to mush, plus food and medicine that touched floodwater.

Drying: be patient with wooden houses

• Open the house to the breeze on sunny days and lift wooden furniture off the floor.
• Wooden houses that stood in water for long need a long time to dry; do not rush to oil or paint.
• Remove soaked ceilings or gypsum walls so the inside can dry.

Ozone day

• Confirm the date, time and travel to Rayong with the WHD team.
• Take people, pets and plants out of the area; open cupboards and drawers.
• Return only after the rest and ventilation period is complete.

After ozone

• Air the house every day and do not let humidity build up.
• Watch walls and wooden floors; if new damp appears, find the cause.
• Monitor family members for at least two weeks after flood contact. If anyone develops fever, calf pain or an inflamed wound, see a doctor.

Frequently Asked Questions About Ozone Disinfection in Rayong

1. Water is still standing outside. Can we do ozone yet?

Not yet. Wait until water has left the house completely and the mud has been removed, the house washed and dried. Treating while there is standing water or high humidity is less effective, but you can contact the team to plan ahead.

2. Does WHD have a branch in Rayong?

No. WHD is based in Bang Khae, Bangkok. People in Mueang Rayong, Klaeng and other parts of the province can call 065-556-6294 or LINE @whd268. The team will confirm travel and a date; same-day arrival cannot be guaranteed.

3. Can an old wooden house be treated with ozone?

Yes, once it has been washed and dried. One advantage is that no large amount of chemicals needs to be poured onto the wood. The team will assess zones and explain how to prepare before the day.

4. How long do we have to stay out?

For the whole treatment and the rest and ventilation period. A typical cycle is about 30 minutes per zone plus rest time, and the team will tell you clearly when you can return.

5. After ozone, we do not need to clean, right?

Wrong. Washing and drying must always come first. Ozone is an extra finishing step, not a replacement.

6. I have a red, swollen wound after walking in floodwater. What should I do?

See a doctor immediately, especially if you also have fever or calf pain, and mention the flood contact. More information is available from the Department of Disease Control and the CDC.

Let Your Rayong Home Breathe Again

Talk to the WHD team to plan ozone treatment for wooden houses, townhouses, shops or guesthouses in Mueang Rayong, Klaeng and nearby areas.

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

Promotion: free medical-grade disinfectant spray with any ozone job of 15,000 baht or more.

Related Pages

• Residential and building ozone disinfection
• Ozone cleaning service
• Ozone disinfection machines
• Certificates
• Contact us

References

• Bangkokbiznews, DDPM flood situation report: bangkokbiznews.com
• Thai PBS: thaipbs.or.th
• World Health Organization fact sheets: who.int
• CDC flood guidance: cdc.gov/floods
• Thailand Department of Disease Control: ddc.moph.go.th