Category: Disaster Medicine, Environmental Safety & Emergency Response
Flash flood lessons from Pua District, Nan: SOS survival, electrocution prevention, and rescue for vulnerable groups
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Emergency — stranded by flash flood in Sila Lang, Pua, Nan
- Trip the Main Breaker immediately — call 1784 (DDPM) · 1669 (EMS) · 054-771-620 (Nan DDPM)
- Share GPS (Google Maps / Line) — enable battery-saving mode
- Move children and bedbound patients upstairs — wave bright cloth / flashlight SOS when you hear rescue boats
If flash flood traps you indoors, act in this order:
1) trip the main household breaker to prevent electrical leakage;
2) move children and bedbound patients to higher ground;
3) share GPS on your phone and enable battery-saving mode;
4) call 1784 (DDPM) or 1669 (EMS) and 054-771-620 (Nan Provincial DDPM);
and 5) signal visually with bright cloth or a flashlight when rescuers arrive.
Incident context: Kun-stream flash flood into Sila Lang, Pua
Flash flood from the Kun stream surged into Ban Khwai, Sila Lang Subdistrict, Pua District, Nan Province —
fast, with little warning. Many residents, young children, and bedbound patients were stranded indoors
because of strong current and cut-off roads.
Per
CDC — Flash Flood Safety,
flash floods arrive faster than typical river floods — decisions in the first 5 minutes often decide survival.
1. First 5 minutes when flash flood enters the house
1Trip the Main Breaker immediately
The top risk is often not water depth but electrical leakage.
When water starts entering, trip the Main Breaker before outlets flood.
Do not touch switches or submerged appliances —
OSHA Flood Safety.
2Move vulnerable people upstairs
Carry young children; help move bedbound patients to the second floor or the highest safe point.
Keep chronic medicines, formula, and clean drinking water within reach.
3Pin GPS and save battery
Open Google Maps or Line → Share Location
and send the house coordinate to responders. Then enable Low Power Mode and dim the screen.
4Call for help
1784 (DDPM) · 1669 (EMS) · 1300 (vulnerable groups)
· 054-771-620 (Nan Provincial DDPM).
Report how many people are stranded, food/water shortage, and house landmarks.
5Make an SOS signal
Daytime: tie red/orange cloth to a window or roof.
Night: flash a torch or phone screen when you hear boats or rescue drones.
Review symptom severity and get personalized guidance from our Advisory team
Emergency hotlines and rescue coordination (Nan focus)
| Agency | Hotline | Channel | Scope of help |
|---|---|---|---|
| Department of Disaster Prevention and Mitigation (DDPM) | 1784 | disaster.go.th | Coordinate boats/trucks, evacuation, nationwide stranded-area reports |
| Nan Provincial DDPM | 054-771-620 | Phone / provincial ops center | Coordinate Pua / Sila Lang, supplies, rescue boats within Nan |
| National Institute for Emergency Medicine (NIEM) | 1669 | niem.go.th | EMS, hospital transport, respiratory distress |
| Social Help Center | 1300 | Line / local agency Facebook | Children, older adults, disability, bedbound patients |
| Police / Fire | 191 / 199 | 1669 app / notify DDPM | Safety, crime, fire in flooded areas |
2. GPS sharing and SOS signals so boat teams can find you fast
- Google Maps: location icon → Share location → send to responders and relatives (Share for X hours if battery is limited)
- Line / Facebook Messenger: + → Location → Share Live Location with an exact house pin (Sila Lang, Pua, Nan)
- What to send: number stranded (children / patients / older adults), floor, house color, landmarks near the Kun stream, supply needs
- Aerial signal: bright cloth (red, orange, yellow) waved as X or O — at night flash torch 3 times, pause, 3 times
- Never: swim out looking for rescuers — undertow and floating debris are lethal
State clearly if food and drinking water are short.
Emergency risk response comparison
| Risk | Warning signs | Do immediately | Never do |
|---|---|---|---|
| Electrical leakage (electrocution) | Power cut, sparks, downed wires, flooded outlets | Trip Main Breaker before outlets flood; stand on dry ground | Enter water with wires; touch submerged appliances; use phone in water |
| Strong flash-flood current | Rapid muddy rise, floating debris, water still climbing | Gather upstairs; wait for rescue; share GPS | Swim out; drive through floodwater |
| Food / drinking-water shortage | Thirsty children/patients; no boiled or sealed water | Prioritize water for children and patients; call 1784 / 054-771-620 | Drink tap water or floodwater |
| Leptospirosis | Fever, muscle pain, red eyes (conjunctival injection) after water contact | Avoid floodwater; wash wounds immediately | Play or swim in floodwater |
| Bedbound patient in respiratory distress | Fast breathing, blue lips, loss of consciousness | Open airway position; call 1669 immediately | Move the bed down to a flooded floor |
3. First aid and care for bedbound patients / young children while stranded and short on food
- Young children: move upstairs first; keep formula, diapers, medicines, and clean water nearby; never let children play near floodwater
- Bedbound patients: move the bed to the highest workable point; prepare oxygen, chronic meds, and spare IV lines if used; monitor pulse and breathing
- Water rationing: children, patients, and older adults first — boiled or sealed bottled water only
- Tell responders: state bedbound and child counts when calling 1784 or 1300 so they can prioritize
- If breathing is hard: call 1669 at once — do not wait for water to rise further
for children, older adults, people with disability, and bedbound patients who need urgent assistance.
4. Donation and aid coordination for Sila Lang, Pua
To coordinate supplies, rescue boats, or evacuation in Sila Lang Subdistrict, Pua District, Nan:
- Call 1784 or 054-771-620 (Nan Provincial DDPM) with needs and a safe drop-off coordinate
- Priority supplies: drinking water, dry/ready food, formula, diapers, chronic medicines, blankets, torches
- Do not enter the area yourself while current is strong — let officials set routes and boat points
- Share only official drop pins announced by DDPM or local government — avoid sending goods to unreachable spots
Per
WHO — Floods and health,
routing aid through official agencies reduces risk from unprotected field entry.
Scientific mechanism: why flash floods kill
By
Asst. Prof. Dr. Norawit Raatpiboon:
Water conducts electricity — leakage from flooded outlets or appliances can cause
electrical injury
within meters.
Flash floods carry high kinetic energy — cars and adults can be swept away.
Floodwater may carry Leptospira from animal urine and sewage pathogens.
Cutting power, avoiding water contact, sharing GPS, and waiting upstairs for rescue are measures that measurably cut deaths.
FAQ
When a sudden flash flood hits Pua District, Nan, what should you do first?
Trip the Main Breaker, move children and bedbound patients upstairs, share GPS,
call 1784 / 1669 / 054-771-620, and signal SOS with bright cloth or a flashlight.
How do stranded people share GPS and request food and drinking water?
Use Google Maps Share Location or Line Live Location.
Send headcount, supply needs, and landmarks.
Enable battery saving; call 1784 or 054-771-620 for urgent needs.
How can you safely care for and move bedbound patients and young children while waiting for rescue?
Move to the highest safe floor; keep meds, oxygen, formula, and water nearby.
Tell 1669 or 1300 that bedbound patients / children are present. Do not leave if the current is strong.
What are the flood emergency hotlines for Nan Province?
1784 DDPM · 1669 EMS · 1300 Social Help Center
· 054-771-620 Nan Provincial DDPM · 191 police · 199 fire
Should you leave the house yourself or wait for rescue?
If water is high and the current is strong, wait upstairs for rescue.
Do not swim out — undertow, debris, and electrical leakage are deadly.
What illnesses are common after floodwater contact?
Leptospirosis, diarrhea, and infected wounds.
Seek care promptly for fever or muscle pain after floodwater exposure.
Support this writing
If this SOS checklist helped you or your community, a coffee-sized donation keeps free, cited disaster guides online in Thai and English.
Read next
Citations (E-E-A-T)
Author:
Asst. Prof. Dr. Norawit Raatpiboon
(ผศ.ดร.นรวิชญ์ ราษฎร์พิบูลย์)
Public-safety disclaimer
This article is an educational first-aid and safety overview.
It is not an official rescue order and does not replace decisions by on-site responders.
In an emergency, follow instructions from 1784, 1669, 054-771-620, or local officials.
For injury or breathing difficulty, call 1669 immediately.