Venomous Animals That Come with Floods: Snakes, Centipedes, Scorpions — Prevention and First Aid


Quick summary During floods, venomous animals such as snakes, centipedes and scorpions flee the water and hide in homes and dry places. The Department of Disease Control advises checking dark corners, beds, shoes and clothes before use. If bitten by a snake, stay calm, move the bitten part as little as possible, do not apply a tourniquet and do not suck out the venom, then get to a hospital quickly or call 1669.
เวลาน้ำท่วม นอกจากเรื่องบ้านและรถแล้ว อีกเรื่องที่คนมักลืมคือสัตว์ที่หนีน้ำเข้ามาอยู่ใกล้ตัวเรา บทความนี้รวบรวมวิธีป้องกันและการปฐมพยาบาลที่ถูกต้อง จากกรมควบคุมโรค โรงพยาบาลจุฬาลงกรณ์ สภากาชาดไทย และสถาบันการแพทย์ฉุกเฉินแห่งชาติ
Which venomous animals come with floods?
When water floods their burrows and habitats, these animals move to dry, warm places, which are often people's homes, piles of stored items and damp corners of the house.

| Animal | Where it usually hides | Danger |
|---|---|---|
| Snakes | Under raised houses, piles of stuff, tall grass, dark corners, bathrooms | Many snake species in Thailand are highly venomous; a bite can be life-threatening |
| Centipedes | Under mattresses, in shoes, wall cracks, piles of clothes | Pain, swelling and redness at the bite |
| Scorpions | Under rocks, woodpiles, in shoes and clothes | Burning pain and swelling at the sting |
How to keep venomous animals out of your home during floods
The Department of Disease Control recommends 5 ways to prevent them

- Check dark corners of the house regularly and keep the lighting bright enough
- Check the bed before sleeping Raise the mattress off the floor and use a mosquito net if you can
- Check clothes and shoes before putting them on and wear boots when walking in gardens or overgrown areas
- Keep the house clean and tidy so there are no hiding places
- Avoid walking in narrow spaces or tall grass at night
If you must wade through water, tap ahead with a long stick before walking and watch for places you cannot see underwater. If you find a snake in the house, do not try to catch it yourself; call 199 for help.
What to do if bitten by a snake
King Chulalongkorn Memorial Hospital, Thai Red Cross Society, recommends these steps

- Stay calm and do not panic
- Note what the snake looks like, or photograph it if you can do so safely, so the doctor can choose the right treatment
- Call for help and dial 1669
- Get to a hospital as quickly as possible and move the bitten part only as much as necessary
- If venom gets in the eyes, rinse them with plenty of clean water
Whatnot to doafter a snake bite
- Do not apply a tourniquet; it does not stop the venom from being absorbed
- Do not suck out the venom
- Do not apply herbal pastes or put ice directly on the wound
First aid for a centipede bite
- Wash the wound with clean water and soap
- Apply a cold compress to reduce pain and swelling
- Take painkillers if needed
- If the pain is severe, the swelling spreads fast, or other unusual symptoms appear, see a doctor
Do not suck the wound, and do not crush the centipede inside the house, because it releases a scent that attracts other centipedes
First aid for a scorpion sting
- Clean the wound and surrounding skin with water and mild soap
- Apply a cold compress to reduce pain and swelling
- Raise the stung part
- Take painkillers if needed, and see a doctor if symptoms do not improve
Numbers to know if attacked by a venomous animal
| Number | When to use |
|---|---|
| 1669 | Medical emergency, ambulance needed |
| 1367 | Ramathibodi Poison Center: advice on poisons and initial care |
| 199 | Fire and rescue: help catching snakes or animals in the house |
| 1784 | DDPM: help during floods |
See other hotlines at all emergency hotlines and read more about floods at What Is Utokkaphai (Flood)?
Ask E26BLC for free on Messenger, or check live flood reports and rain radar before you travel.
Frequently asked questions
Why are venomous animals more common during floods?
Because floods fill their burrows and habitats, they flee to dry places, which are often people's homes, piles of stored items and damp corners of the house.
Should I apply a tourniquet after a snake bite?
No. King Chulalongkorn Memorial Hospital, Thai Red Cross Society, states that a tourniquet does not stop venom absorption. Move the bitten part as little as possible and get to a hospital quickly.
Should I photograph the snake that bit me?
If you can do it safely, yes, because it helps the doctor identify the species and choose the right treatment. But do not waste time chasing the snake.
Are centipede bites dangerous?
Most cause pain, swelling and redness at the bite. Wash the wound, apply a cold compress and take painkillers if needed. If symptoms get worse, see a doctor.
What should I do if I find a snake in the house?
Back away, do not try to catch or hit it, keep people and pets away from the area, and call 199 for help.
Where can I get advice about poisoning?
Call the Ramathibodi Poison Center at 1367 for advice. In an emergency, call 1669 right away.
Summary
During floods, snakes, centipedes and scorpions flee the water and come closer to us. You can prevent bites by checking dark corners, beds, shoes and clothes before use. If bitten by a snake, stay calm, move as little as possible, do not apply a tourniquet, do not suck out the venom, and get to a hospital quickly. The information in this article is basic first aid only, not medical treatment.
Sources:
Department of Disease Control: 5 ways to prevent venomous animals during floods (Bangkok Biz News)
King Chulalongkorn Memorial Hospital, Thai Red Cross Society: no tourniquet for snake bites
Thai PBS: 3 venomous animals of the rainy season (citing NIEM, the Department of Disease Control and Siriraj)
Ramathibodi Poison Center
Compiled by E26BLC
Ask about anything: floods, evacuation routes and two-way radio
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