A Story from the Field: A Nurse Opens the Health Center Door After the Water Recedes

Nurse Arunee is 45 and has worked at a sub-district health center in Bang Krathum for almost fifteen years. She knows nearly every family in the area. She knows which grandmother comes every month for blood pressure medication, which toddlers are due for their next vaccinations and which diabetic patients come in every week to have the wounds on their feet dressed.

When the floodwater rose to almost half a meter inside the building, the health center had to close and staff carried essential medicines to higher shelves. On the morning the water dropped enough to get inside, Nurse Arunee found the floors of the examination room and waiting area covered in a thick, sticky layer of mud. The legs of the examination bed, the medical supply cabinets and the rows of waiting chairs all carried a clear tide line. Low on the pharmacy walls, grey and black mold spots had begun to appear. Most upsetting of all was the smell: a heavy, damp odor mixed with the stench of overflowing drains that filled the whole building. The wound-dressing room, which should be the cleanest room of all, smelled the worst because it shares a wall with the bathroom.

Her phone never stopped ringing. Villagers wanted to know when they could have their dressings changed. One patient was nearly out of blood pressure tablets. Children in the village had itchy rashes from wading through water. The village headman asked her to reopen as soon as possible because people were starting to come down with diarrhea. Nurse Arunee wanted nothing more than to open the doors, but as a nurse she knew that reopening a wound-dressing room still carrying floodwater contamination would put patients with open wounds and weak immune systems at real risk.

She and two colleagues spent two long days shoveling mud, scrubbing floors and wiping every cabinet they could reach. By the evening of the second day the rooms looked cleaner, yet the musty smell was still there the next morning, and a fresh patch of mold had appeared behind the medicine shelves. It became clear to her that hard work alone was not going to make the building safe for patients.

This situation is a realistic picture of what many clinics and health centers in the Nan and Yom river basins, from Bang Krathum to Phrom Phiram and nearby districts, face after the water recedes. These small facilities are the front line of community health. When they reopen late, villagers have to travel long distances to district or provincial hospitals that are already overwhelmed.

Why Healthcare Facilities Need a Higher Standard After a Flood

A flooded home needs to be cleaned so its residents are safe. A clinic or health center needs to meet a higher bar, because the people walking through the door are already unwell. Many have open wounds or are elderly, very young, pregnant or living with chronic illness and weakened immunity. These are the risks that must be managed.

1. Floodwater germs left in examination rooms

• Bacteria from sewage. Floodwater that has passed through drains and septic tanks deposits E. coli and other intestinal bacteria on floors, bed frames and furniture. These germs transfer easily to the hands of staff and patients.
• Leptospirosis. Rat urine in water and mud poses a danger to the staff who clean the building and to patients with cuts or abrasions.
• Wound infection. A dressing room with lingering contamination can cause diabetic ulcers, minor surgical wounds or injuries from wading through water to become reinfected, making them much harder to treat.

2. Mold in the pharmacy and supply rooms

Pharmacy rooms are usually closed spaces with tightly packed shelves and little airflow. When humidity soars after a flood, mold spreads quickly across walls, wooden shelving, cardboard boxes and medicine labels. Medicines whose packaging got wet or moldy should be removed according to the guidelines of the responsible health authority, and the room and shelving must be disinfected before a new stock is brought in. Otherwise the replacement supplies are at risk too.

3. Airborne mold spores and vulnerable patients

Mold spores in the air trigger allergies and asthma. Patients with chronic lung disease, older people and small children sitting in a damp waiting room may suffer flare-ups. Staff also have to work in those rooms for many hours each day.

4. Community trust and lost time

Every day a facility stays closed means patients missing medication, wounds left undressed and vaccinations postponed. For private clinics, a long closure also means lost income while fixed costs keep running. Yet reopening too early, while musty odors and mold stains are still visible, undermines patient confidence and damages the reputation of a place that is supposed to set the standard for hygiene.

Why Routine Cleaning Is Not Enough After a Flood

Healthcare facilities already follow daily cleaning protocols, but those routines were designed for normal conditions, not for buildings that sat in sewage-contaminated water for days.

• Wiping surfaces with standard cleaners. Wiping only reaches what hands can reach. The space under medicine cabinets, behind examination beds, inside cable trunking and in water-damaged ceiling panels is often missed.
• Using strong bleach. Bleach can disinfect hard surfaces, but its fumes irritate the airways of patients and staff, it can corrode the metal parts of medical equipment and it does little for mold in porous materials such as gypsum ceilings or plywood.
• Running the air conditioning or fans to dry things out. This speeds up drying, but if the air conditioning system was flooded or has mold growth, turning it on can spread spores throughout the building.
• Using air freshener sprays. They mask odors briefly without removing the cause, and strong fragrances in a clinic can even trigger symptoms in allergy patients.
• Painting over moldy walls. The mold returns within weeks or months, and the whole job may have to be redone.

Healthcare facilities therefore need disinfection that covers every surface and the air in every room, combined with systematic control of mold and odors.

What Makes Bang Krathum Facilities Particularly Exposed

Bang Krathum lies on the flat lowlands south of Phitsanulok city, where the Nan River winds through rice fields and villages. Many health centers were built at ground level on land that floods in heavy years, and most are single-story buildings with no upper floor to move equipment to. Their pharmacy rooms and record rooms are often compact, enclosed spaces designed to keep medicines secure, which also means they trap humidity. Walls are usually rendered brick and ceilings are gypsum board, both of which soak up water and stay damp long after the floor looks dry. Combined with the area's high humidity at the end of the rainy season, these conditions allow mold to establish itself within days. That is why a structured disinfection and ozone plan matters so much here.

The Solution: Disinfection Fogging Plus Ozone Treatment for Clinics and Health Centers

Fogging with Chemgene HLD4H, a high-level disinfectant for healthcare

WHD uses CHEMGENE HLD4H, a high-level disinfectant designed for healthcare environments that acts against bacteria, viruses and fungi. It is applied with an Ultra Low Volume (ULV) fogging machine that turns the solution into a very fine mist. The mist drifts into every part of the room and settles on floors, walls, examination beds, medicine shelves, the underside of desks and the corners that wiping cannot reach. Only a small amount of liquid is used, so surfaces are not drenched, which makes the method suitable for rooms containing equipment and paperwork.

Ozone treatment to reduce mold spores and eliminate musty odors

After fogging, the team seals the room and runs a high-output ozone treatment. Ozone is an oxidizing gas that spreads throughout the space and reaches into privacy curtains, chair upholstery, ceiling panels and porous materials. It helps destroy mold spores and airborne bacteria and breaks down the molecules responsible for musty and drain-like smells. When the treatment time ends, ozone reverts to oxygen and leaves no residue.

How the service works for healthcare facilities

1. Site survey and planning with staff. The team assesses the examination rooms, pharmacy, dressing room, vaccination room, bathrooms and waiting area, and sets the order of work to match the facility's reopening plan.
2. Guidance on mud removal and sorting. WHD advises on removing mud, washing floors and moving medicines, records and electronic equipment out of the area before fogging.
3. Fogging with Chemgene HLD4H. Every flooded room is treated, with special attention to dressing rooms, bathrooms and shared patient corridors.
4. Ozone shock treatment. Rooms are closed and treated according to their size, zone by zone, so that areas that are ready can reopen first.
5. Ventilation. Doors and windows are opened until the ozone has dissipated to a safe level before staff and patients return.
6. Follow-up check and ongoing advice. The team checks odor and room condition and advises on humidity control in the pharmacy and on daily surface disinfection routines.

A Reopening Checklist for Clinic and Health Center Staff

• Protect yourself first. Wear rubber boots, rubber gloves and a mask and keep any wounds fully covered whenever you clean flooded areas.
• Sort medicines and supplies. Medicines or supplies with wet packaging, smudged labels or mold should be separated and handled according to the guidelines of your supervising authority.
• Check the vaccine refrigerator. If power was lost or the fridge was flooded, follow cold-chain procedures before using any vaccine.
• Clean and disinfect equipment. Medical devices that came into contact with floodwater must go through proper cleaning and disinfection before they return to service.
• Inspect air conditioners and exhaust fans. If they were submerged or smell musty, clean them and check for mold before switching them on.
• Zone your patients. In the first weeks, consider separating patients with skin infections and diarrhea from general patients to reduce cross-infection.
• Communicate with the community. Let villagers know which services have resumed and which rooms are still being treated, so they come at the right time and do not crowd the waiting area.

The Conditions Your Facility Will See in the Weeks After the Flood

Preparing the building is only half of the job. Clinics and health centers should also expect a particular mix of cases once they reopen, and a clean, well-organized space makes handling that surge much easier.

• Skin problems. Fungal infections between the toes, itchy rashes and infected scratches are extremely common among people who spent days wading through water or cleaning their homes barehanded. These patients need clean dressing areas and careful hand hygiene by staff.
• Diarrheal illness. Contaminated drinking water, spoiled food and flooded kitchens lead to a rise in diarrhea and food poisoning, particularly among children and older people. Bathrooms in the facility will see heavy use, so they must be disinfected thoroughly and cleaned frequently.
• Suspected leptospirosis. Fever, severe muscle pain, especially in the calves, and headache after contact with floodwater should raise suspicion of leptospirosis. Early referral and treatment matter, and staff should follow guidance from the Department of Disease Control.
• Respiratory symptoms and allergies. Coughs, sneezing and asthma attacks increase as people sleep in damp, moldy rooms. A waiting area free of mold spores avoids making these patients worse while they wait.
• Injuries and chronic disease follow-up. Cuts from debris, missed medication for diabetes and hypertension, and stress-related complaints all add to the workload.

Knowing this in advance helps staff decide which rooms to prioritize for treatment. In most cases the dressing room, bathrooms, waiting area and pharmacy should be ready first.

Planning a Realistic Reopening Timeline

Every building is different, but a phased plan usually works best for small healthcare facilities. The first phase is mud removal, sorting of supplies and basic washing, done by staff and volunteers with proper protective gear. The second phase is professional disinfection fogging and ozone treatment, carried out zone by zone. The third phase is ventilation, a final check, restocking of the pharmacy and a soft reopening for essential services such as wound care, chronic disease medication and urgent consultations. Full services, including vaccination clinics and health promotion activities, can follow once humidity is under control and the vaccine cold chain has been verified. Agreeing on this sequence with the WHD team during the site survey means everyone knows what will be ready and when, and the community can be told clearly which services are back.

10 Reasons Bang Krathum Clinics and Health Centers Choose WHD

1. Healthcare-grade disinfectant. Chemgene HLD4H is suited to examination and dressing rooms.
2. Reaches every corner. Our disinfection service fogs beneath beds and behind medicine cabinets.
3. Rooms stay dry. Low-volume application protects documents and furniture.
4. Fewer airborne mold spores. Our ozone treatment service makes rooms safer for allergy and asthma patients.
5. Musty and drain odors removed at the source. No masking fragrances.
6. No ozone residue. Learn more on our page about ozone for odor and chemical residue removal.
7. Zone-by-zone treatment. Part of the facility can reopen sooner.
8. Easy daily follow-up. Use Chemgene HLD4H spray for routine surface disinfection after reopening.
9. Mosquito control around the building. Add our mosquito spraying service where water is still standing.
10. Restored trust. The facility becomes the community's reliable first stop for care again.

Before and After

In the Words of a Health Center Nurse (Field Scenario)

"We spent two full days cleaning by ourselves, but the dressing room still smelled and mold kept appearing in the corners of the pharmacy. Once the WHD team fogged and ozone-treated the rooms one at a time, the strong smell dropped a lot. We were able to reopen the dressing room first, so villagers who need their wounds dressed every week could come back to us instead of traveling all the way into town."
— Nurse Arunee, sub-district health center, Bang Krathum (a composite persona based on real situations)

Frequently Asked Questions

Q: Do medicines and supplies need to be moved out before fogging?
A: We recommend moving medicines, supplies, records and electronic equipment out first, or covering them securely, so the fogging is thorough and packaging is protected.

Q: Can we reopen immediately after fogging and ozone treatment?
A: Rooms can be used once ventilation is complete at the time the team advises. Facilities should also follow their supervising authority's guidance on medicines, vaccines and medical equipment.

Q: Can rooms containing medical equipment be ozone-treated?
A: The team assesses each site with staff. Sensitive equipment may need to be moved out or covered before treatment.

Q: Can patients or staff stay in the room during ozone treatment?
A: No. People, pets and plants must be out of the room during treatment, and the room must be ventilated before anyone goes back in.

Q: Should disinfection be repeated?
A: It depends on the extent of damage and remaining humidity. If mold or odor returns, the team will assess and recommend additional treatment.

Q: Is the service suitable for private clinics as well as public health centers?
A: Yes. The same approach works for private medical and dental clinics, physiotherapy rooms, pharmacies and public sub-district health centers. The plan is adjusted to the size of the building, the number of rooms and the services you need to restore first.

Q: What can we do ourselves while waiting for the team?
A: Remove mud while it is still soft, move medicines and records to a dry place, open windows during dry hours and keep everyone who cleans in boots, gloves and masks. Avoid painting walls or reinstalling ceiling panels until the building has been treated and has dried properly.

Q: Do you serve Bang Krathum and the rest of Phitsanulok?
A: Call 065-556-6294 or message LINE @whd268 to check coverage and book a site survey.

Help Your Community's Health Facility Reopen Safely

Talk to WHD about a disinfection fogging and ozone treatment plan for your examination rooms, pharmacy and dressing room.

View Disinfection Service – Click Here

Book Ozone Treatment – Click Here

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

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Reference: World Health Organization – Floods fact sheet and Department of Disease Control, Thailand