A Story From the Field: The Morning Nok's Family Came Home

In a townhouse estate off Rama II Road in Bang Khun Thian district, Bangkok, water that had stood for almost ten days had finally dropped below floor level. Nok, her husband and their two daughters had been staying with relatives. Early that morning they drove back to see the house. When they opened the front door, the place was eerily quiet. The air was heavy with the smell of mud, stagnant water and damp.

A thin film of mud coated every downstairs tile. The fabric sofa had soaked up water and was stained brown halfway up the backrest. The refrigerator lay tipped on its side in the corner of the kitchen. A tide line ran around the walls at about waist height, and beneath it gray-green spots of mold were already appearing. Her younger daughter held her hand tightly and asked, "Mum, can we sleep at home tonight?"

Nok stood still for a moment, because she genuinely did not know where to begin. Should she turn the lights on first? Wash the floor or move things out? Could the sofa be saved? Would the smell go away on its own? These are the same questions thousands of families in Bang Khun Thian, Tha Kham, Samae Dam and the southern Thonburi side of Bangkok are facing in 2026.

This guide lays out the first seven days after the water recedes, one day at a time, so that every family can move back in safely and without wasting effort doing things twice. Think of it as a checklist you can pin to the fridge, once the fridge is standing up again.

Why the Order of Work Matters

Many families try to do everything at once because they want their home back as quickly as possible. Unfortunately, doing things in the wrong order usually means doing them twice and paying twice. Painting before the walls are dry brings the mold straight back. Spraying disinfectant before the mud is gone means the product never reaches the surface it was meant to treat, because the mud shields the germs underneath.

The days after a flood are also a period when health risks are at their highest:

• Leptospirosis from mud and standing water contaminated with rat urine, entering through cuts on the hands and feet.
• Diarrhea from food, drinking water and dishes that were touched by floodwater.
• Skin infections and "water-rotted" feet from wading through water and mud for long periods.
• Mold allergies and asthma as fungi start growing within days of the water going down.
• Electrical hazards from sockets and wiring that were under water, which can cause shocks or short circuits.

From a money and time perspective, following a clear sequence helps you decide what to throw away, what to repair and where it makes sense to call in professionals, so you are not paying for the same job more than once.

The First 7 Days, Day by Day

Day 1: Safety comes first

• Switch off the main breaker before going in. If the consumer unit is mounted low and was submerged, do not touch it yourself. Have an electrician or the Metropolitan Electricity Authority check it first.
• Turn off the gas valve and check for any smell of leaking gas.
• Look for structural damage: cracks in walls, sunken floors, or ceiling boards that have absorbed water and may fall.
• Dress for protection: rubber boots, rubber gloves, a face mask and eye protection.
• Photograph the damage for insurance or assistance claims before you start moving things.
• Watch out for unwelcome visitors. Snakes, centipedes and scorpions often shelter in dark corners and piles of belongings after a flood.

Day 2: Remove and sort damaged belongings

• Throw away all food, medicines and cosmetics that touched floodwater.
• Mattresses, pillows, fabric sofas, carpets and particleboard furniture that sat in water for a long time are usually not worth saving. Set them aside for disposal.
• Do not plug in electrical appliances that were submerged to "see if they work." Have a technician check them first.
• Put wet important documents into bags and let them dry in the shade.
• Keep a list of everything you throw away, with photographs.

Day 3: Get all the mud out

• Shovel mud out while it is still soft. Once it dries, it turns into dust that carries germs into the air.
• Work from top to bottom, walls before floors, and from the inside of the house toward the door.
• Wash with clean water and detergent, scrubbing grout lines and door frames.
• Clear drains and inspection chambers so mud does not block them.

Day 4: Open up and dry out

• Open every door and window during the day.
• Use fans to blow air out of the house, and run dehumidifiers in closed rooms.
• Open all cupboards and drawers and lift belongings off the floor.
• If walls are gypsum board or swollen plywood, you may need to cut away the lower section so the cavity behind can dry.
• Do not paint or hang wallpaper yet.

Day 5: Survey for mold and book professionals

• Walk through the house and note every mold spot: walls, behind cabinets, under stairs and on ceilings.
• Notice where the musty smell is strongest, especially bedrooms and rooms that stayed closed.
• Book a survey with WHD's disinfection fogging service and ozone treatment service to plan the treatment day.
• Arrange somewhere for people, pets and plants to stay on ozone day.

Day 6: Disinfection fogging and ozone treatment

• The team fogs CHEMGENE HLD4H as a fine mist through every room and onto every surface, reaching corners that cannot be wiped.
• The house is then closed up and treated with ozone from equipment such as the Master Ozone Generator to destroy airborne mold spores and break down musty odors.
• No people, pets or plants may be inside during ozone treatment.
• Ventilate for the full time the team specifies before going back in.

Day 7: Re-check, set up and plan repairs

• Check again for odor and mold.
• Clean high-touch surfaces with Chemgene HLD4H spray.
• Plan wall repairs, painting and furniture replacement for when the walls are fully dry.
• Have an electrician inspect the wiring before putting the whole house back on power.

Note: the timings above are a general guide. Houses that were flooded for longer, or have thick masonry walls, may need more drying time. Our team will help you judge when the house is ready for fogging and ozone.

Equipment Checklist Before Day 1

• Rubber boots, heavy rubber gloves, face masks, safety glasses and long-sleeved clothing.
• Shovels, stiff brooms, floor squeegees, buckets and scrubbing brushes.
• Heavy-duty garbage bags for separating wet waste from damaged belongings.
• Detergent or general cleaner, plus clean water for washing hands.
• A flashlight and spare batteries, because the power may not be usable yet.
• A first aid kit with antiseptic and waterproof plasters. Cover any cuts before you start working.
• A notebook and a phone for photographing damage.

A note for homes in Bang Khun Thian

Bang Khun Thian is the only Bangkok district that touches the Gulf of Thailand, and it is laced with canals. At times, high tides push seawater inland, so the water can take longer to recede here than in other areas, and floodwater may be brackish. Salt slows the drying of stains on walls and floors and can corrode metal such as hinges, handles and steel furniture frames. Rinse thoroughly with fresh water before drying, and learn to tell the white crust of salt on walls apart from fluffy mold growth. If you are unsure, ask our team during the survey.

Room-by-Room Priorities in a Typical Bangkok Townhouse

Most homes in the housing estates along Rama II Road share a similar layout: a ground floor with a living room, kitchen and bathroom, and bedrooms upstairs. Floodwater usually affects the ground floor most, but the whole house needs attention because air, moisture and odor move freely between floors.

Kitchen

The kitchen is the highest priority for hygiene. Throw away every food item that touched water, including sealed packets with paper labels. Wash and then disinfect counters, sinks, cutting boards and any cookware you intend to keep. Check under the sink, where pipes and cabinets trap both water and smell. Refrigerators that were submerged should be checked by a technician before use, and their contents discarded.

Living room

This is usually where the largest pieces of soft furniture are. Fabric sofas, rugs and floor cushions are the main sources of lingering smell. Once they are out, the room is mainly a matter of washing floors, cleaning the lower parts of walls and letting everything dry. Curtains that touched the water should be washed in hot water or replaced.

Bathroom and drains

Sewage can back up through floor drains and toilets during a flood. Flush the toilet only when you are sure the drains are flowing, and scrub and disinfect every surface. Pour clean water into floor drains to refill traps so sewer gases do not escape into the house.

Stairwell and upstairs bedrooms

Even if water never reached the upper floor, humid air rises. Bedrooms that were closed for ten days often develop a stale, musty smell and mold on the backs of wardrobes. Open them up, wash bedding, and include the upper floor in the professional fogging and ozone treatment so the whole house is reset at once.

Looking After Your Family's Health During the Clean-Up

The cleaning itself can be a source of illness if you are not careful. Wash your hands with soap and clean water before eating, drinking or touching your face. Take breaks in a clean, dry area and drink plenty of bottled or boiled water. Keep children and older relatives away from the house during the heavy mud work if you can; their immune systems are more vulnerable, and there is a lot of sharp debris around. At the end of each day, change out of your work clothes outside the clean area and wash them separately. Small, consistent habits like these prevent many of the infections that commonly follow floods.

Pay particular attention to your feet. Many people in Bangkok wade through floodwater in sandals, and small cuts or blisters on the feet are one of the main entry points for leptospirosis bacteria. Wear closed rubber boots whenever you are working in mud, dry your feet thoroughly at the end of the day, and treat any cut straight away with antiseptic and a waterproof dressing. If someone in the family has diabetes or poor circulation, be extra careful, because foot wounds can become serious quickly. Following trusted public health guidance from the Department of Disease Control and the Department of Health is also a good way to stay informed about local outbreaks and vaccination advice after the flood.

What Not to Do in the First 7 Days

• Do not plug things in or flip switches before an electrician has checked the system.
• Never mix bleach with toilet cleaners or ammonia. The combination releases dangerous gases.
• Do not rely on bleach alone and assume the job is done. It does nothing for mold in the air or odor soaked into materials.
• Do not cover smells with air freshener instead of removing the source.
• Do not paint over mold stains before the walls are dry.
• Do not let children play in water or mud still standing around the house.

It is completely understandable to want to make the house look normal again as fast as possible, especially with children waiting to come home. But a house that looks clean and a house that is safe are not always the same thing in the first week after a flood. Prioritizing safety and order over appearance will get your family back home sooner in the end.

Why Professional Disinfection Fogging and Ozone Treatment?

After the mud is gone and the house has had time to dry, it may look clean. But germs still linger in corners and crevices, and mold spores are still floating in the air. Fine-mist disinfection fogging carries disinfectant to every surface, while ozone treatment deals with what is in the air and with odors trapped in walls, furniture and curtains.

Think of it this way: your own cleaning removes what you can see, and professional treatment deals with what you cannot. Together they turn a house that has been cleaned into a home that feels healthy again.

The WHD service process

1. Site survey: water level, mold spots and the rooms with the strongest odors.
2. Clean-up and sorting advice so the house is ready before treatment day.
3. Chemgene HLD4H fogging in every room, on every surface.
4. Ozone treatment sized to the house and the severity of the odor.
5. Ventilation until the ozone has reverted to oxygen.
6. Re-check and advice on ongoing care.

Learn more on our residential ozone disinfection page.

10 Reasons Bang Khun Thian Families Choose WHD for the Final Stage of Recovery

1. Finish the job with confidence. After you have cleared the mud yourself, let our disinfection fogging service handle the details.
2. Every corner reached. The mist drifts behind cabinets and under furniture.
3. Medical-grade disinfectant: Chemgene HLD4H.
4. Odor removed at the source with ozone treatment.
5. Fewer airborne spores, better for children and allergy sufferers.
6. No residue. See ozone for odors and chemical residue.
7. Saves effort: no more scrubbing every crevice by hand again and again.
8. Advice that follows the right sequence, so you know what comes next.
9. Mosquito control too. Standing water around the house breeds mosquitoes; add our mosquito spraying service.
10. The whole family can sleep at home again with peace of mind.

Before and After the First Seven Days

What Homeowners Tell Us (Example Scenario)

"The first day back was so stressful. I had no idea where to start. Once we had a clear order, we just took it one day at a time. We managed the mud ourselves, but the musty smell would not go away. In the end we had the team come in to fog and do the ozone treatment. The day we moved back, my daughter said the house didn't smell anymore, and that night all four of us slept at home."

— Mother of two, Rama II area, Bang Khun Thian (illustrative scenario based on field work)

After Day 7: Caring for Your Home Over the Next Month

• Ventilate every day, and run a dehumidifier in bedrooms.
• Check the lower parts of walls weekly. If a new mold spot appears, wipe it and let our team know.
• Wipe door handles, light switches and dining tables with disinfectant spray regularly.
• If a mattress or sofa that was not submerged smells stale, add our dust mite removal service.
• Tip out containers and clear standing water around the house to reduce Aedes mosquitoes and dengue risk.
• If anyone develops a high fever, muscle pain (especially in the calves) or severe diarrhea, see a doctor promptly and mention that they waded through floodwater.

Recovery from a flood is emotional as well as physical. It is normal to feel tired, frustrated or low in the weeks afterward. Breaking the work into small daily steps, asking neighbors and relatives for help, and handing the heaviest or most technical tasks to professionals can make the whole process feel more manageable.

Frequently Asked Questions

Q: How many days after the water recedes should we do fogging and ozone?
A: Clear the mud and let the house dry to a reasonable level first. Many homes are ready within the first week, but it depends on how long the flood lasted and the type of walls. Our team will help you judge.

Q: We cleaned the mud ourselves. Do we still need disinfection?
A: Clearing mud removes dirt, but germs remain in crevices and corners. Fine-mist fogging disinfects much more thoroughly.

Q: How long do we need to stay out for ozone treatment?
A: For the whole treatment and ventilation period. The time depends on the size of the house and the severity of the odor, and our team will tell you clearly.

Q: Can we keep a sofa or mattress that was submerged if it is treated with ozone?
A: Items that soaked in floodwater for a long time usually have contamination deep in the foam and are best discarded. Ozone helps with items that were not submerged but smell musty.

Q: What should we prepare before the team arrives?
A: Clear the mud, remove damaged items, move people, pets, plants and food out, and make sure the team can access every room.

Q: Do you serve Bang Khun Thian and nearby districts?
A: Call 065-556-6294 or message LINE @whd268 to check service areas and book a survey.

Reached Day 5? Book the WHD Team Now

Families in Bang Khun Thian and southern Thonburi: let us help you finish your home recovery properly.

View Disinfection Service – Click Here

Book Ozone Treatment – Click Here

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

Related Links

• Residential ozone disinfection
• Dust mite removal service
• Chemgene HLD4H disinfectant spray 750ml
• All articles

Health reference: World Health Organization (WHO): Floods fact sheet · Thailand Department of Disease Control