Example Case: A Curry-and-Rice Stall in Yan Nawa, 2026 (B.E. 2569)

Note: this is an illustrative example built from situations that are common after urban riverside floods. It is not the account of any specific customer.

Auntie Noi runs a small curry-and-rice stall at the front of her house in a soi in Bang Phong Phang, Yan Nawa. Every morning she prepares green curry, braised eggs, fried Vietnamese pork sausage and glass noodle salad. Some fresh ingredients go into a two-door fridge behind the stall; ham, sausages and milk for her grandchild stay in the house fridge.

At the end of September 2026 (B.E. 2569), heavy rain fell for days. Water rose in the soi and the power went off several times, once for most of a night. She kept the fridge door closed to save the cold. When the power returned and the fridge felt cold again, she assumed everything inside was fine. The next day she fried the sausages from the fridge and put the glass noodle salad from the day before back on sale.

What she did not know is that the fridge may have stayed above 4 degrees Celsius for hours. Ready-to-eat foods that are not reheated, such as salads, ham and cold sausages, are the foods most often linked to Listeria. Even more important, Listeria does not stop growing when the fridge cools down again. It is a cold-tolerant germ that keeps multiplying slowly at normal fridge temperatures.

There was more. Water had seeped into the back of the stall. The drip tray under the fridge held stale water, the door seal had black stains, and the vegetable drawer was full of meltwater and rotting scraps. Her daughter, five months pregnant, often came to help and liked to snack on the pork sausage. After reading food safety advice from the Department of Disease Control, Auntie Noi threw out anything doubtful, scrubbed the fridge completely, washed the kitchen floor and called a team to spray the kitchen and stall after cleaning, before reopening.

The Yan Nawa Flood of 2026 (B.E. 2569): Facts from News Reports

The location facts below come only from news reports published during the 2026 (B.E. 2569) floods.

• According to Thai PBS, on 29 September 2026 (B.E. 2569) the Department of Disaster Prevention and Mitigation (DDPM) declared Chong Nonsi and Bang Phong Phang subdistricts in Yan Nawa flood disaster assistance zones.
• According to Daily News, on 1 October 2026 (B.E. 2569) the Bangkok Metropolitan Administration warned the Rong Si community, about 61 households outside the flood wall along the Chao Phraya River, to watch for high water.
• Nationally, DDPM data published by the Government Public Relations Department as of 06:00 on 7 October 2026 (B.E. 2569) listed 27 provinces plus Bangkok affected, covering 123 districts, 984 subdistricts and 1,154,875 households, or more than 3.1 million people.

Auntie Noi's stall is an example case. Location names, dates and household numbers come only from the reports cited.

What Is Listeria monocytogenes, and Why Is It Called the Fridge Germ?

Listeria monocytogenes is a small rod-shaped Gram-positive bacterium found in soil, water, vegetation, sediment and the faeces of some animals. The illness it causes is called listeriosis. The World Health Organization (WHO) describes it as relatively rare compared with other foodborne infections, but often severe when it strikes people in high-risk groups.

What sets Listeria apart from common food poisoning germs such as Salmonella or E. coli is its ability to grow at refrigerator temperatures. Most bacteria slow down a lot in the cold, but Listeria keeps dividing slowly at about 4 degrees Celsius. That is why food safety agencies single it out for chilled ready-to-eat foods.

The good news is that Listeria does not survive proper heat. Cooking food thoroughly and reheating leftovers until steaming hot lowers the risk a great deal. The problem is food that people eat cold, which is common in city kitchens.

For disinfection purposes, Listeria belongs to the bacteria group that CHEMGENE HLD4H says it covers in general. However, Listeria is not one of the specific organisms with test results listed on WHD's web pages. If you need test data for this organism, you can ask the WHD team directly.

How Does Listeria Spread, and Why Did the Yan Nawa Flood Raise the Risk?

Listeria mainly reaches people through contaminated food. It is not spread by breathing or talking like a cold, although a pregnant woman can pass it to her unborn baby. Floods do not make it airborne, but they create conditions that let food become contaminated and let the germ multiply.

1. Power cuts that warm the fridge for hours

General US food safety guidance says a closed fridge keeps food cold for about 4 hours during an outage. A full freezer holds for about 48 hours, a half-full one for about 24. If the outage lasts longer, or the door is opened often, perishable food that has been above 4 degrees Celsius for more than 2 hours should be thrown away.

2. The belief that everything is safe once the power is back

Germs that multiplied during the outage do not disappear when the fridge cools down again, and Listeria keeps growing in the cold. Ready-to-eat food that went through a warm spell is even riskier.

3. Floodwater and seepage in the kitchen

Water in the soi or seeping into homes carries soil, sediment and sewage, which can contain Listeria and other germs. If it flows under the fridge or counters and the same hands or cloths touch the floor and the food, germs move from floor to plate.

4. Food shops that must keep trading

In a city district like Yan Nawa, curry stalls, made-to-order kitchens and fresh food stalls are part of daily life, and many keep trading during floods because it is their main income. Food made in advance, left out for long, or stored in a fridge that just lost power can spread risk to many customers.

High-Risk Foods to Watch After a Power Cut

• Ham, sausages, Vietnamese pork sausage and sliced cold meats eaten without reheating
• Salads, cut raw vegetables, raw bean sprouts and cut fruit, especially melon
• Unpasteurised milk and some soft cheeses
• Chilled smoked or processed seafood and raw fish
• Leftovers kept for days and eaten without heating until steaming hot
• Sandwiches and chilled boxed meals bought in bulk

If these foods were in the fridge during a long outage or touched floodwater, the safest rule is simple: when in doubt, throw it out. Smell and appearance cannot tell you whether Listeria is present; contaminated food often looks and smells normal.

Listeria Symptoms: Fever, Aches, Diarrhea, and Serious Signs That Need a Doctor

Gut-related illness

Healthy people may have mild symptoms such as low fever, muscle aches, nausea, vomiting or diarrhea, often starting within about a day of eating contaminated food and clearing within a few days. Many people mistake it for ordinary diarrhea after a flood.

Invasive illness

In high-risk people the germ can move from the gut into the blood or nervous system. Symptoms may start much later, sometimes weeks after eating the food. According to the CDC, the incubation period can stretch to several weeks and up to about two months. Watch for:

• High fever, chills and severe tiredness
• Severe headache and stiff neck
• Confusion, loss of balance or seizures
• In pregnancy, often just fever and flu-like symptoms, yet the infection can lead to pregnancy loss, premature delivery or serious infection in the newborn

Because of the long incubation, anyone who ate risky food during the Yan Nawa flood of 2026 (B.E. 2569) should not assume they are safe after one week. Pregnant women, older adults and people with chronic illness who develop fever or unusual symptoms should see a doctor promptly and mention chilled food eaten after a power cut. This article is not medical advice; diagnosis and treatment belong to doctors.

Who Is Most at Risk After the Yan Nawa Flood of 2026 (B.E. 2569)?

• Pregnant women, who are far more likely to get listeriosis than other adults, and whose babies can be affected even when the mother feels only mildly unwell
• Newborns infected before or during birth
• Older adults, especially those aged 65 and over, a sizeable group in older city neighbourhoods like Yan Nawa
• People with weak immunity, such as those on chemotherapy, transplant recipients, people with kidney failure or poorly controlled diabetes, and people on immune-suppressing medicines
• Food vendors, who may stay well themselves yet pass risk on to customers

Where Listeria Hides in Fridges, Kitchens and Food Shops After the Water Recedes

• Fridge door seals, with deep grooves that trap crumbs and moisture
• Vegetable and meat drawers, where juices collect
• Drip trays and defrost drains, which hold water constantly
• Chopping boards, knives and slicers used for cold meats
• Sink drains and kitchen floor drains, especially after seepage
• Display fridges and glass food cabinets at curry and noodle stalls

Why Cleaning the Fridge and Kitchen Yourself Is Not Always Enough

Cleaning is the most important step and always comes first. But after a flood, many homes see the same problems return:

• Surface wiping only. Dish soap removes grime but is not designed to disinfect and can spread germs from one spot to another.
• One cloth for everything. A cloth used on the floor and then on the fridge is one of the commonest routes for germs.
• Hard-to-reach spots. Door seal grooves, drawer rails and the space under the fridge are hard to reach by hand.
• Home-mixed chemicals. Bleach that is too weak may not work; too strong can damage surfaces and irritate airways. Never mix it with ammonia or acid cleaners.

That is why the WHO, the CDC flood pages and Thailand's Department of Disease Control all point to the same order: throw away doubtful food, clean first, then disinfect, use safe water, and wash hands often. A professional team can help finish the job in larger spaces or homes with high-risk members.

How to Recover a Fridge After a Power Cut or Flood, Step by Step

1. Check electrical safety first. If the fridge was submerged or the plug got wet, do not plug it in. Have an electrician check it. A fridge flooded up to the compressor or insulation may need replacing.
2. Sort the food. Throw out anything that touched floodwater, ready-to-eat food that went through a long outage, and anything doubtful. Bag it tightly before disposal.
3. Remove shelves, drawers and drip trays. Wash them in warm water with dish soap and let them dry.
4. Clean the inside. Wipe walls, seals and drawer rails, using a soft brush in grooves, then wipe with a clean cloth.
5. Disinfect. Use a disinfectant suitable for food-contact surfaces, observe the label contact time, then wipe or rinse as directed.
6. Reset temperatures. Keep the fridge at or below 4 degrees Celsius and the freezer around minus 18 degrees Celsius. A fridge thermometer helps.

WHD Disinfection Spraying After the Yan Nawa Flood 2026 (B.E. 2569) with CHEMGENE HLD4H

Once homes, food stalls and kitchens in Yan Nawa have been cleared of mud and cleaned, the next step for added confidence is the disinfection spraying service from World Health Disinfection (WHD). According to the service page:

• Trained technicians spray and/or ULV-fog (Ultra Low Volume fine mist) so the disinfectant reaches surfaces and corners.
• The disinfectant is CHEMGENE HLD4H, a medical-grade product from the United Kingdom containing Benzalkonium Chloride and Didecyldimethylammonium Chloride.
• The product and service pages say it covers viruses, bacteria and fungi, naming COVID-19, RSV, H1N1, H5N1, hand-foot-and-mouth virus and Salmonella among others, with a 99.99% claim on the service page, and describe it as broad-spectrum.
• The service page lists approvals and references from the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019.

Transparency about Listeria: Listeria is a bacterium, within the bacteria group the product says it covers in general, but WHD does not list a Listeria-specific test result. Food businesses or families with a pregnant member who want organism-specific data should ask the team first. Spraying treats kitchen and home surfaces; it does not make contaminated food safe. Doubtful food must always be thrown out.

The WHD post-flood spraying process

1. Survey. The team asks by phone or LINE about the area size, flood level, seepage points and who lives there, then plans the job.
2. Mud removal and washing first. The owner removes mud, discards contaminated food and washes floors, walls, fridges and dishes, because disinfectants work best on clean surfaces.
3. Zoning. Kitchen, prep area, shop front, bathroom and bedrooms are separated to set the spraying order, and food, dishes and personal items are moved out of the zone.
4. Spraying. People, children, pregnant women and pets leave the zone. Technicians cover floors, lower walls, counters, cabinets, handles and rails.
5. Re-entry. According to the service page, wait about 30 minutes before normal use, following the technicians' instructions on site. Food-contact surfaces should be rinsed or wiped with clean water as the technicians advise before food goes on them.

WHD is based in Bang Khae, Bangkok 10160. Contact the team by phone or LINE to ask about service in Yan Nawa and other areas; dates depend on the schedule and booking. The service page also mentions a free CHEMGENE spray bottle and WELLGIENIC wet tissues with the service, and tax invoices are available. For musty air, see the complementary residential ozone disinfection service.

10 Reasons to Book Disinfection Spraying After the Yan Nawa Flood of 2026 (B.E. 2569)

1. Finish the kitchen job properly. Post-flood disinfection spraying builds on the cleaning you have already done.
2. Bacteria group coverage stated by the product. Listeria is a bacterium, and organism-specific data can be requested.
3. Reaches hidden spots. ULV mist reaches under counters, behind cabinets and into wall joints.
4. Suits food shops that must keep trading. Yan Nawa stalls can show customers they take post-flood hygiene seriously.
5. Protects high-risk family members. Homes with pregnant women, older adults or immunocompromised members get extra care.
6. Medical-grade disinfectant. CHEMGENE HLD4H lists standards and institutions on the WHD site.
7. No home mixing. Avoids wrong dilutions and dangerous chemical mixes.
8. Short wait. About 30 minutes before re-entry, as the technicians advise.
9. Peace of mind. After an exhausting flood, a professional team helps you trust your kitchen again.
10. Easy to ask. Call 065-556-6294 or LINE @whd268 about a disinfection service near me in Yan Nawa.

Before and After Spraying: A Yan Nawa Curry Stall Kitchen

This before-and-after scene is an illustrative example of the process, not a testimonial from a specific customer.

Listeria and Kitchen Hygiene Checklist After the Yan Nawa Flood 2026 (B.E. 2569)

Food

• Discard food that touched floodwater and perishables out of the cold for over 2 hours.
• Pregnant women, older adults and immunocompromised people should avoid chilled ready-to-eat food for now.
• Reheat leftovers until steaming hot and do not keep them for days.
• Use separate boards and knives for raw and cooked food.
• Cook with boiled or bottled water.

Fridge and kitchen

• Have an electrician check any wet fridge before plugging it in.
• Wash shelves, drawers, seals and drip trays, then dry them.
• Keep the fridge at or below 4 degrees Celsius and check it with a thermometer.
• Replace sponges and cloths that touched floodwater.
• Clean floors, drains and under counters before booking spraying.

Frequently Asked Questions: Listeria, Fridges After Power Cuts and Post-Flood Disinfection

What is Listeria?

Listeria monocytogenes is a bacterium found in soil, water and some foods. It can grow in the fridge and causes listeriosis, which is serious for pregnant women, newborns, older adults and people with weak immunity.

Is fridge food safe after a power cut during a flood?

If the outage was under about 4 hours and the door stayed shut, most food is usually fine. Perishable food above 4 degrees Celsius for more than 2 hours, or food that touched floodwater, should be thrown away. When in doubt, throw it out.

How does Listeria spread?

Mostly through contaminated food such as chilled cold meats, raw vegetables, cut fruit and unpasteurised milk. A pregnant woman can pass it to her baby. It does not spread through the air like a cold.

What are the symptoms of Listeria infection?

Healthy people may have fever, aches, nausea and diarrhea. High-risk people may have high fever, headache, stiff neck, confusion or seizures, sometimes weeks after eating. Seek care quickly for serious symptoms.

Is Listeria dangerous in pregnancy?

Yes. Pregnant women are much more likely to be infected, and it can lead to pregnancy loss, premature delivery or serious infection in the newborn. Avoid risky foods and see a doctor for any fever.

How do I clean a fridge after a flood?

Check the electrics, discard doubtful food, wash shelves and drawers in warm soapy water, scrub seals and drip trays, disinfect according to the label, then keep the fridge at or below 4 degrees Celsius.

Can disinfection spraying eliminate Listeria?

Listeria is a bacterium within the bacteria group CHEMGENE HLD4H says it covers in general, but there is no Listeria-specific result on WHD's pages. Ask the team for data. Spraying does not make contaminated food safe.

Do I need to clean before spraying?

Yes, always. Remove mud, discard food and clean surfaces first, because dirt stops disinfectants working properly.

When can I go back in or reopen my shop after spraying?

According to the service page, about 30 minutes after spraying, following the technicians' instructions on site. Everyone must leave the zone during spraying.

Is there a disinfection service near me in Yan Nawa, Chong Nonsi or Bang Phong Phang?

Call 065-556-6294 or LINE @whd268. The team will confirm available dates based on the schedule. WHD is based in Bang Khae, Bangkok.

The Water Has Gone Down in Yan Nawa in 2026 (B.E. 2569). Let WHD Finish the Job

A safe kitchen starts with throwing away doubtful food and cleaning the fridge and surfaces, then finishing with disinfection spraying by an experienced team. If your home, food stall or building in Chong Nonsi, Bang Phong Phang or the riverside communities of Yan Nawa was affected by the 2026 (B.E. 2569) floods, contact us to plan the job.

Related Services

• WHD disinfection spraying service
• CHEMGENE HLD4H disinfectant
• Residential ozone disinfection

References

• Thai PBS, flood assistance zones, 29 September 2026 (B.E. 2569): https://www.thaipbs.or.th/news/content/558867
• Daily News, Rong Si community warning, 1 October 2026 (B.E. 2569): https://www.dailynews.co.th/news/6237649/
• Government Public Relations Department, DDPM flood data as of 7 October 2026 (B.E. 2569): https://www.prd.go.th/th/content/category/detail/id/33/iid/548715
• World Health Organization, Listeriosis: https://www.who.int/news-room/fact-sheets/detail/listeriosis
• CDC, Listeria: https://www.cdc.gov/listeria/
• CDC, Floods: https://www.cdc.gov/floods/
• Department of Disease Control, Thailand: https://ddc.moph.go.th/