A Story From the Field: "Every Day the Shutter Stays Down Is a Day of Lost Customers"

Mui has run a grocery and household goods shop in a shophouse in Bueng Kum for more than twenty years. Most of her regulars live in the same soi and drop in for eggs, fish sauce, washing powder and snacks for their children. Next door is Prae's small hair salon, and beyond that Ton's phone repair shop. All three businesses live on daily takings.

During the 2026 floods, water on the road outside rose until it came into the shops almost a hand's width deep, and it stayed for three days. Mui managed to carry part of her stock upstairs, but the cases of drinking water, the sacks of rice and everything on the bottom shelves went under. When the water finally drained away, she rolled up the steel shutter to find a thin film of mud across the whole floor. The legs of her metal shelving were starting to rust. The drinks fridge had lost power and its contents had begun to smell. There was a water line along the bottom of the walls, and a musty odor mixed with a drain smell hung over the entire shop.

Mui's first question was not "How do I clean this?" but "When can I open again?" Every day the shop is closed, her regulars have to buy from the minimart at the mouth of the soi, and some of them might never come back. At the same time, she worried that if she opened too soon, while the shop still smelled and might still harbor germs, customers would feel uncomfortable and her reputation could suffer even more. Prae at the salon asked the same question. Her clients sit in the chair for an hour or more. Who wants to sit in a salon that smells musty?

This guide brings together a 72-hour plan for shop owners in Bueng Kum, Khlong Kum, Nawamin and nearby areas, so you can reopen quickly without skipping the steps that matter for the safety of both you and your customers.

Why Shops Need to Move Fast, but Must Not Cut Corners

Health. Urban floodwater flows through drains, rubbish bins and septic tanks, bringing bacteria such as E. coli and organisms that cause diarrhea into shops, along with Leptospira, the cause of leptospirosis, carried in rat urine wherever rats are common. Shops that sell food and drinks, or that offer close-contact services like hair salons, need thorough disinfection. Mold growing behind shelves and inside walls triggers allergies, coughing and sneezing in owners, staff and customers alike.

Money. Small shops run on daily cash flow. The longer the shutter stays down, the more fixed costs such as rent and wages keep running with no income to cover them. But reopening without discarding contaminated stock, or while the shop still smells musty, can cost even more in complaints and customers who quietly go elsewhere.

Reputation. Customers in the soi remember which shops reopened quickly and cleanly. A shop that comes back with confidence, for example with a sign explaining that it has been disinfected and treated with ozone, usually wins more loyalty than one that opened fast but still smells damp.

Time. Planning the work in time blocks prevents doing things twice, such as stocking shelves and then having to take everything down again for disinfection.

The 72-Hour Plan: Reopening Safely

Note: 72 hours is a target for shops where the water was not very deep and the structure is undamaged. If the water was deep, stayed a long time, or damaged the electrical system, it may take longer. Safety always comes before speed.

Hours 0 to 12: Safety and recording the damage

• Do not switch on lights or plug anything in until an electrician has checked the wiring and the breaker board.
• Put on rubber boots, rubber gloves and a mask before going in, and cover any cuts or scrapes.
• Photograph and video the damage from every angle, including damaged stock, for insurance or any relevant agency.
• Call to book a survey with a disinfection and ozone team now, so you secure a slot early.

Hours 12 to 24: Discard stock and clear the mud

• Throw away food, drinks and goods in non-waterproof packaging that touched floodwater, as well as anything in fridges that lost power for a long time.
• Set aside goods in sealed, waterproof, undamaged containers. Clean the outside before deciding whether they can be sold, following public health guidance.
• Shovel out mud, wash floors, scrub shelves, counters and fridges, and discard cardboard and absorbent materials.
• Open doors and windows for ventilation, and use fans to help drying once the mud is out.

Hours 24 to 48: Disinfection fogging and ozone treatment

• The WHD team surveys the shop and fogs CHEMGENE HLD4H with ULV equipment across floors, walls, shelving, behind fridges, the stockroom and the toilet.
• Ozone treatment follows with the shutter closed, to deal with mold spores and break down musty, drain and spoiled-food odors.
• No people, pets or plants may be in the shop during treatment. Electronics such as the cash register, computers and phone repair equipment are covered or moved out.
• The shop is fully ventilated, as advised by the team, before anyone goes back in.

Hours 48 to 72: Restock and get ready for customers

• Wipe food-contact and product-contact surfaces according to your usual routine, then put fresh stock on the shelves, raised off the floor and away from the walls.
• Make sure fridges are back at normal temperature before loading drinks.
• Set up a hand-washing point or hand gel at the entrance, and keep a CHEMGENE 750 ml spray handy for the counter and door handles during the day.
• Put up a sign letting customers know the shop has been cleaned, disinfected and treated with ozone, so they feel confident coming in.

Shortcuts Many Shops Take, and Often Have to Redo

• Pouring bleach everywhere and opening straight away. Chlorine loses its strength quickly against mud, the sharp smell puts customers off, and it does not reach behind fridges or under shelving.
• Burning incense or spraying fragrance. Customers end up smelling two things at once, and the musty smell returns overnight once the shutter is closed.
• Selling flood-affected stock at a discount. It risks customers' health and the shop's reputation, which is not worth the small amount of income.
• Painting over water stains immediately. Walls that are still damp make paint bubble, and mold pushes back through within weeks.
• Restocking shelves before disinfection. Everything has to come down again, doubling the work.

Why Disinfection Plus Ozone, and How WHD Works

The disinfection service from World Health Disinfection (WHD) uses ULV foggers that turn CHEMGENE HLD4H into a very fine mist, which drifts into places a cloth cannot reach: behind fridges, under shelving and into the gap between the counter and the wall. Our ozone treatment service uses ozone gas at a controlled concentration to deal with mold spores and break down odor molecules trapped in walls, ceilings and other materials in the shop.

Our process for shops

1. Shop survey. We assess the floor area, the water line and any mold, and schedule the work to fit your reopening plan.
2. Clean-up advice. We tell you which stock and materials should be discarded and which surfaces need scrubbing before treatment day.
3. Preparing the shop. People, animals, plants, food and good stock are moved out, and electronics are covered or removed.
4. ULV disinfection fogging. Throughout the shop, including the stockroom and toilet.
5. Ozone treatment. The shop is closed and treated for a time suited to its size.
6. Ventilation. The shutter and windows are opened so the ozone can break down, and our team tells you when it is safe to go in.
7. Re-check. Odor and mold are checked again before reopening. If damp spots remain, we recommend further steps.

Tips by Type of Shop

Grocery shops and minimarts. Focus on fridges, the bottom shelves and the stockroom. Raise every pallet and stack off the floor.

Hair salons and massage shops. Chairs, cushions and fabrics that soaked up water should be replaced or thoroughly laundered. After ozone treatment, our dust mite removal service can be used on fabric seats that are still in good condition.

Phone repair and electronics shops. Move all devices and stock out of the area before ozone treatment, or store them in sealed boxes.

Small restaurants and cafés. Concentrate on the kitchen, grease traps and drains, which are often the real source of odor. Learn more about lingering odors on our page about ozone treatment for odors and chemical residue.

Shops with living quarters upstairs. Many shophouse owners in Bueng Kum live above the shop. You can plan treatment of the living space at the same time. See residential ozone disinfection.

Talking to Customers When You Reopen

Reopening is not only about a clean shop. It is also about rebuilding trust with people who have been through the same flood. Your customers want to know that the eggs, drinks and snacks they buy from you are safe, and that sitting in your salon chair or waiting at your repair counter will not make them sick.

A short, honest sign at the entrance goes a long way. Explain in simple words that the shop was flooded, that damaged stock was discarded, and that the premises were cleaned, disinfected and treated with ozone before reopening. Avoid exaggerated claims; customers appreciate plain facts. If you post on social media or a community chat group, a few before-and-after photos showing the clean shelves and fresh stock can bring regulars back faster than any discount.

Keep hand gel at the counter for the first few weeks, and wipe the counter, card machine and door handles regularly during the day where customers can see you doing it. Visible cleanliness reassures people. If someone mentions a smell or notices something you missed, thank them and deal with it quickly. Small gestures like these show that you take their health seriously, and that is what turns a reopened shop back into the trusted neighborhood shop it was before the water came. Many owners also find that a quiet word of thanks to loyal customers, perhaps a small welcome-back gesture in the first week, helps the whole soi feel that life is returning to normal.

Working Together With Neighboring Shops

In a row of shophouses, the flood rarely affects only one unit. The water came in under every shutter, the mud spread along the whole frontage, and drains and walls are shared. That means one shop that stays dirty can send smells, insects and even rats into the shops on either side. It also means neighbors can help each other recover faster.

Consider agreeing with the shops next to you on a shared clean-up day. Shoveling mud from the shared walkway, clearing the drain in front of the row, and arranging collection of flood waste together saves everyone time. When it comes to disinfection and ozone treatment, scheduling several shops on the same day makes coordination easier, because each owner knows when the shop next door will be closed and ventilated.

Shared walls also matter for ozone safety. If gaps or vents connect two units, both owners need to know when treatment is taking place so nobody is inside the adjoining space at the wrong moment. Our team can help coordinate this when several shops in the same building book together. A coordinated recovery also looks better to customers walking down the soi: a whole row of clean, freshly reopened shops sends a strong message that the neighborhood is back in business.

Keeping Records and Protecting Your Staff

In the rush to reopen, paperwork and staff safety are easy to forget, yet both can make a real difference in the weeks that follow.

Keep a simple flood file. Store your photos and videos of the damage, a list of stock you threw away with approximate quantities, receipts for cleaning supplies and repairs, and any service reports from electricians or disinfection teams. If you have business insurance, contact your insurer early and ask what evidence they need before you dispose of damaged goods. Even without insurance, these records help if you apply for any assistance programs for affected businesses, and they help you understand your real losses when planning the months ahead.

Look after the people doing the work. Whether it is family members, employees or friends who come to help, everyone handling mud and damaged stock should wear boots, gloves and a mask. Provide clean water and soap for washing hands before eating. Rotate heavy tasks so nobody becomes exhausted, because tired people get injured. Anyone who develops a fever, muscle pain, diarrhea or an infected wound in the days after the clean-up should see a doctor and mention the flood exposure. This guide is not medical advice, so always follow the guidance of health professionals.

Plan for the next flood while it is fresh in your mind. Note how high the water came and which items were lost. Could stock be stored higher? Could the fridge sit on a raised base? Could sockets be moved up the wall during repairs? A few small changes now can mean a much faster reopening next time.

10 Reasons Shop Owners in Bueng Kum Choose WHD

1. CHEMGENE HLD4H for disinfecting the surfaces customers touch every day.
2. ULV fogging reaches behind fridges, under shelves and into the stockroom.
3. Ozone treatment breaks down musty, drain and spoiled-food odors rather than masking them.
4. Work is scheduled to match your reopening plan.
5. Advice on discarding stock to protect your customers and your reputation.
6. Careful assessment of shophouses that share walls with neighbors.
7. Cash registers, computers and electronics are covered or moved before treatment.
8. We can treat a single shop or several units in the same row, helping coordinate with neighbors.
9. Sprays and the Master Ozone Generator are available for ongoing care.
10. Easy to reach by phone and LINE, with quick survey appointments.

In a Shop Owner's Words

"What helped most was splitting the work into time blocks. I called the team on the first day, and while I waited I threw out the damaged stock and cleared the mud. Once they fogged and ran the ozone, the smell in the shop dropped a lot. I restocked the shelves and put up a sign for customers. Quite a few regulars told me they were glad the shop was back and that it looked cleaner than before."
— A grocery shop owner in Bueng Kum district (field scenario)

Frequently Asked Questions

Is 72 hours really realistic?
For shops where the water was shallow and the structure is sound, many owners manage it if they plan ahead and book the team early. If there is electrical or structural damage, it must be made safe first, whatever the timeline.

Do neighboring shops need to close during ozone treatment?
Usually not, but our team assesses gaps and vents between units and informs neighbors when needed for safety.

Can bottled or canned goods that touched floodwater still be sold?
Follow public health guidance. Generally, food in non-waterproof or damaged packaging should be discarded, and sealed, undamaged containers must be cleaned thoroughly on the outside first. If in doubt, throwing it away is the safer choice.

How long does the shop need to stay closed on treatment day?
It depends on the size of the shop, but it usually takes only part of a day, including ventilation time. Our team will tell you when it is safe to return.

How much does it cost?
It depends on floor area and the level of damage. Please contact us to arrange a survey and request a quotation.

What should we do after reopening?
Ventilate every morning, check the stockroom for mold weekly at first, wipe high-touch points during the day, and if the musty smell returns, contact us for a targeted repeat treatment. Standing water outside the shop can also breed mosquitoes; our mosquito spraying service can help.

Can treatment be done at night so we do not lose a trading day?
In many cases the work can be arranged outside your busiest hours, as long as there is enough time for treatment and full ventilation before anyone enters. Tell us your preferred schedule when you book the survey and we will plan around it where possible.

Want to Reopen Fast and Safely? Call Us on Day One

Shop owners in Bueng Kum, Khlong Kum, Nawamin and nearby areas can contact the WHD team to arrange a survey.

View Our Disinfection Service

Book Ozone Treatment

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

Related Links

• Ozone treatment for odors and chemical residue
• CHEMGENE HLD4H 750 ml spray
• Mosquito spraying service
• All articles
• External sources: WHO fact sheet on floods and the Department of Health, Thailand