The Krasae Bon flood in 2026: what the news reported

According to 4FORCE NEWS, in a report dated 29 September 2026, water from the Prasae Reservoir overflowed its spillway and poured into Moo 4, Krasae Bon Subdistrict, Klaeng District, Rayong Province. Several hundred households and durian orchards were affected. Villagers who had lived there for 60 years said they had never seen anything like it. Rescue teams evacuated older residents and laid sandbags, and as of 03:15 on 28 September the water had not yet receded (source: 4forcenews.com). Conditions change daily, so please follow announcements from Klaeng District and Rayong Province as well.

Nationally, a Department of Disaster Prevention and Mitigation update at 06:00 on 5 October 2026, reported by Daily News, listed 26 provinces plus Bangkok as affected, covering 1,270,151 households (source: dailynews.co.th).

The water at Krasae Bon came from a reservoir spilling over, then flowing across farmland, orchards and village roads before reaching homes. Water like this carries soil, mud, plant debris, animal manure and septic waste. And because the level stayed high for a while, floors, walls and belongings soaked longer than they would in a flash flood that comes and goes. That is why soil-borne germs and sewage germs sit near the top of this ranking.

Flood spots in Krasae Bon, Klaeng, and the areas to check once water recedes

The report names Moo 4, Krasae Bon Subdistrict, Klaeng District, and mentions several hundred households and durian orchards. It does not give water depths or individual lanes, so we do not add numbers that are not in the source. What we can do is point to the places that matter in rural homes and farm areas after long-standing water:

• The ground floor and the open space under raised houses, often used for sitting, storage and sometimes as the sleeping area for older relatives.
• The kitchen and drinking water storage, including large jars, tanks and shallow wells that floodwater may have entered.
• Toilets and septic tanks, which can overflow or back up when the ground is saturated.
• Farm equipment sheds holding sprayers, fertiliser bags, boots and tools.
• Paths between the house and the orchard, which growers walk through mud every day to check their trees.
• Behind the sandbags, where mud, leaves and trapped water usually remain when the bags are removed.

Disinfection spraying focuses on the house, toilets, kitchen and buildings people use. It is not for orchards or open soil, which are not surfaces spraying can meaningfully treat.

A typical scenario: evacuated, but her heart is still at home

(An illustrative example scenario, not a real resident of Moo 4, Krasae Bon.)

Auntie Boonmee is in her seventies and lives in a two-storey wooden house with her son, who grows durian. On the night the reservoir water arrived, a rescue team took her to a shelter while her son stayed to help neighbours stack sandbags until dawn. She kept telling everyone that in her whole life she had never seen water like this.

Days later, when the water dropped, her son went to the orchard first because he was worried about trees standing in water. He waded through mud in sandals, with cuts on his hands from hauling sandbags, and only then came home to clean. Mud coated the ground floor above ankle height, the water jars held sediment, the bathroom stank from an overflowing septic tank, and his mother's mattress downstairs was soaked through.

He wanted his mother home as soon as possible, but he worried whether a house just out of the water was safe for an older person. His questions were simple: what should be dealt with first, and which germs really matter? This ranking is the answer.

How we built the post-flood germ ranking for Krasae Bon, Klaeng (an editorial ranking)

This is an editorial ranking by WHD. It is not official data or statistics from any agency, and it is not based on testing in Moo 4, Krasae Bon. We include no case counts or percentages without a source. We used five criteria:

1. Link to flooding in WHO, CDC and Department of Disease Control guidance.
2. Fit with rural, orchard settings where people handle mud and standing water as part of daily work.
3. Fit with slow-receding water, as the report says levels had not dropped in the early hours.
4. Local vulnerable groups: evacuated older residents, growers with wounds, and people with conditions such as diabetes.
5. Persistence and ease of spread, described qualitatively only.

Ten germs to watch in Krasae Bon homes and durian orchards

No. 1: Leptospira, the cause of leptospirosis

Orchards and rural villages host plenty of rats and other animals. In a flood their urine mixes into water and mud, and the bacteria enter through cuts or skin softened by soaking. Growers who wade into orchards every day are the highest-risk group, and the Department of Disease Control warns about this every flood season. Watch for sudden high fever, headache, severe calf pain and red eyes. Anyone with these signs after wading should see a doctor promptly and mention the flood exposure. Rubber boots, gloves and covered wounds are the main protection. Indoors, wash areas rats may use, such as kitchens, under-house spaces and rice stores, then spray. Leptospira falls in the bacteria group, but WHD's website shows no organism-specific test, so ask WHD for test data if you need it.

No. 2: E. coli and sewage bacteria (Escherichia coli)

Most rural homes rely on septic or soak-away tanks. When the ground stays saturated, waste rises and mixes with floodwater, along with livestock manure and farmyard fertiliser. E. coli signals faecal contamination. Key spots are bathrooms, kitchen floors, water jars and shallow wells. Expect diarrhoea, cramps and nausea; older adults and children can dehydrate. Do not drink from wells or jars the flood reached until they are cleaned and local authorities say the water is safe; use bottled water meanwhile. E. coli belongs to the bacteria group the product says it covers, without an organism-specific test on the website.

No. 3: Burkholderia pseudomallei, the cause of melioidosis

This bacterium lives in soil and surface water in Thailand and across Southeast Asia. It enters through wounds in contact with mud, by breathing in muddy spray, or by swallowing contaminated water. Growers who dig, repair drainage channels or move sandbags bare-handed are exposed, especially people with diabetes, kidney disease or heavy alcohol use. Symptoms may include fever, cough or abscesses, sometimes long after exposure, so tell your doctor about mud contact after the flood. Boots and gloves are the effective defence. Spraying indoors reduces bacteria on cleaned surfaces as part of the bacteria group, but it cannot treat orchard soil, and there is no organism-specific test on the website.

No. 4: Indoor mold (Aspergillus, Penicillium, Stachybotrys)

Wooden and half-wooden houses that soak for a long time are prime mold territory. WHO and CDC advise drying within 24 to 48 hours where possible, but slow-receding water delays that. Check wall boards, wooden floors, mattresses, pillows, blankets and wardrobes. Effects include blocked nose, coughing and asthma or allergy flare-ups, which matter greatly for older people returning home. Discard soaked mattresses and absorbent materials, wash and scrub, dry the house, then spray. Product information states coverage of fungi and mold in general.

No. 5: Norovirus and rotavirus

These stomach viruses spread through contaminated food and water, hands and shared surfaces. When many people help move belongings, share meals and use the same toilet, spread is easy. Norovirus causes sudden vomiting and diarrhoea; rotavirus is common in small children. Wash hands with soap before eating, and people with symptoms should not prepare food for others. Product information states coverage of norovirus; rotavirus has no organism-specific test on the website and belongs to the virus group the product mentions.

No. 6: Salmonella and Shigella

A flooded rural kitchen, with its pots, chopping boards and dry food stored low, can harbour both. Shigella causes dysentery and spreads even from small doses; Salmonella causes food poisoning. Symptoms include fever and diarrhoea, sometimes with mucus or blood. Discard food that touched floodwater and wash utensils with clean water and detergent. Product information states coverage of Salmonella; Shigella belongs to the bacteria group without an organism-specific test on the website.

No. 7: Respiratory viruses during evacuation: influenza, RSV and COVID-19

The report says rescuers evacuated older residents. When people stay together in limited space, tired and short of sleep, respiratory viruses spread more easily, and they can follow people home on hands and belongings. Wipe and disinfect door handles, stair rails, remote controls, phones and dining tables. Anyone with fever or cough should wear a mask and rest apart. Service information states coverage of COVID-19, RSV and influenza H1N1 and H5N1.

No. 8: Hepatitis A virus

Hepatitis A spreads through food and water contaminated with faeces, so flooded shallow wells and water jars raise the risk. Symptoms can include fever, fatigue, nausea and yellowing of the skin and eyes, and may appear weeks after exposure. Drink safe water, eat cooked food and wash hands; ask a doctor about vaccination if you think you are at risk. It belongs to the virus group, without an organism-specific test on WHD's website.

No. 9: Wound bacteria (Staphylococcus, Streptococcus) and tetanus risk

Hauling sandbags, cutting fallen branches and clearing damaged goods often cause cuts. Wounds exposed to muddy water can become infected, red, swollen and full of pus. Tetanus comes from soil spores entering deep or puncture wounds, and surface spraying does not prevent it. Rinse wounds with clean water, cover them and see a doctor about tetanus vaccination. Staphylococcus and Streptococcus belong to the bacteria group the product mentions, without organism-specific tests on the website.

No. 10: Skin fungi and "flood foot" (dermatophytes)

Growers whose feet stay in water and mud for days often develop soggy, itchy skin between the toes that can turn into a fungal infection. Wash feet with soap and dry them after every trip to the orchard, and change damp socks and boots. See a doctor if a rash spreads or a wound forms. Indoors, wash and disinfect doormats and bathroom floors. These organisms fall in the fungi group the product says it covers.

What happens when post-flood germs are ignored in an orchard household

Growing families juggle a damaged house, trees standing in water and a season's income at risk. If someone falls ill with leptospirosis, diarrhoea or an infected wound, the labour needed to save the orchard disappears overnight. Older relatives returning from a shelter may face mold in a bedroom that never dried properly, worsening allergies or lung conditions. And cleaning the same rooms again and again because the musty smell returns eats into time that should go to the orchard.

Why washing with well water or bleach alone may fall short

Many rural households wash out mud with groundwater or well water. That removes dirt, but if the well itself was flooded, the rinse water may be contaminated too. Bleach is useful when used correctly, yet it must be diluted as the label says, used with ventilation, and never mixed with other cleaners, particularly products containing ammonia or acid, because dangerous gases can form. It also damages wood and fabric.

Fatigue is the other problem. Growers splitting their days between the house and the orchard often clean only once, in a hurry. Spaces under stairs, behind cupboards, along the base of walls and beneath raised floors get missed. Fans and open windows help drying but do not disinfect, and air fresheners only mask the smell. WHO and CDC set a clear order: clean first, then disinfect. A team that carries out the disinfection step systematically closes the remaining gaps.

WHD post-flood disinfection spraying for homes in Klaeng, Rayong

WHD is based in Bang Khae, Bangkok 10160, and has no branch in Rayong. Jobs in Klaeng District can be arranged by calling 065-556-6294 or messaging LINE @whd268 to book a slot in advance, subject to team availability. We do not promise same-day arrival, but we can advise on preparing the house while you wait.

According to service information, trained technicians spray and/or ULV-fog (Ultra Low Volume fine mist) with CHEMGENE HLD4H, a medical-grade disinfectant from the UK containing Benzalkonium Chloride and Didecyldimethylammonium Chloride. The service page lists viruses, bacteria and fungi including COVID-19, RSV, H1N1, H5N1 and hand-foot-and-mouth virus, claims 99.99%, and cites the Department of Medical Sciences, Mahidol University, NHS England and EN 14476:2013+A2:2019. WHD describes the product as broad-spectrum and states no strain count. Customers listed on the service page include hospitals, schools, malls, airports, offices, airlines, banks and residential buildings.

Service steps for an orchard home

1. Send photos and book: photograph the ground floor, kitchen, bathroom and equipment shed and send them via LINE @whd268 so the team can size the job.
2. Remove mud and clean: the household or volunteers clear mud, discard damaged items, wash surfaces and let them dry. Spraying always comes after this step.
3. Prepare and zone: put away food, dishes, children's items and personal belongings. All people and pets leave the zone being sprayed.
4. Spray: technicians work zone by zone, focusing on bathrooms, the kitchen, older relatives' bedrooms and shared touch points.
5. Wait and return: according to service information, wait about 30 minutes or as long as the technicians advise, then rinse food-contact surfaces with clean water.

We do not claim the product leaves no residue, and spraying is not a substitute for treatment. Anyone with fever, calf pain, diarrhoea or an inflamed wound after the flood should see a doctor.

10 reasons Krasae Bon orchard homes should choose WHD spraying

1. Older relatives coming back from evacuation deserve a home that has been cleaned and disinfected step by step.
2. Medical-grade CHEMGENE HLD4H, which the disinfection spraying service says covers viruses, bacteria and fungi.
3. Fine mist reaches under-house spaces, stair gaps and wooden wall edges better than cloths.
4. It lightens the load on growing families who need their energy for the orchard.
5. It follows the clean-then-disinfect order from WHO and CDC.
6. A wait of about 30 minutes per service information before using the space again.
7. Trained technicians advise on zoning and what to put away before spraying.
8. A tax invoice is available per the service promotion, useful for registered farm businesses and community enterprises.
9. A free CHEMGENE spray bottle and WELLGIENIC wet tissues for ongoing touch-point care.
10. Upcountry jobs planned over LINE, with no need to travel to Bangkok.

Before and after spraying an orchard home

Example case: a three-day plan before bringing mother home

(An illustrative example case, not a customer review.)

On day one, Auntie Boonmee's son put on boots and gloves, covered the cuts on his hands and cleared mud from the ground floor. He threw out the mattress, pillows and dry food that had soaked, cleaned the water jars and set aside bottled water. On day two he opened the house to the breeze, scrubbed the wooden walls and bathroom floor, and sent photos to the technicians over LINE. On day three, with the house dry enough, the team sprayed zone by zone while everyone waited outside, then the family waited as advised before going back in.

Afterwards the family set up a foot-washing point by the door, kept orchard boots outside and watched everyone's health for at least two weeks. When Auntie Boonmee came home, her downstairs bedroom had a new mattress and no musty smell, and her son knew that fever and calf pain after a day in the orchard meant going straight to hospital.

Recovery checklist for an orchard home

Before spraying: wait for local authorities to say it is safe to return; have an electrician check sockets, switches and any submerged water pump; wear boots, gloves and a mask and cover every wound; discard food, medicines and cosmetics that touched floodwater; clean jars, tanks and containers and use bottled water until your source has been checked; remove mud, wash surfaces and let them dry before booking.

After spraying: wait as long as the technicians advise; rinse food-contact surfaces with clean water; keep orchard boots and clothes outside; watch for fever, calf pain, diarrhoea, cough or swollen wounds and see a doctor if they appear; ventilate and look for damp patches or new mold.

FAQ: post-flood germ ranking for Krasae Bon, Klaeng

Is this ranking official?
No. It is WHD's editorial ranking based on WHO, CDC and Department of Disease Control guidance and the local setting described in the news. No testing was done in Moo 4, Krasae Bon.

Can you spray the durian orchard?
The service targets buildings and surfaces people use, such as homes, bathrooms, kitchens and equipment sheds. It is not designed for orchards or soil. For tree care after flooding, ask agricultural authorities.

When can we use a flooded well again?
Use bottled water for now and ask local public health officials about testing or treating the water.

When can an older relative go back inside after spraying?
According to service information, after about 30 minutes, or as the technicians advise.

Does WHD have a branch in Rayong?
No. WHD is in Bang Khae, Bangkok. Book upcountry work in advance on 065-556-6294 or LINE @whd268.

Does spraying remove melioidosis bacteria from the soil?
No. Spraying only helps on cleaned indoor surfaces. Boots, gloves and covered wounds protect you from soil.

House washed? Let WHD spray it before your family moves back in

Book post-flood disinfection spraying for Klaeng and nearby areas in advance.

See the Disinfection Spraying Service

Call 065-556-6294 | LINE @whd268

Related services and references

• WHD disinfection spraying service
• Ozone treatment for musty homes (complementary)
• 4FORCE NEWS, 29 Sep 2026: Prasae Reservoir overflow floods Moo 4, Krasae Bon
• Daily News, DDPM 5 Oct 2026: dailynews.co.th
• WHO fact sheets, CDC Floods, Department of Disease Control