Category: Disaster warning, emergency flood preparedness & Nan River hydrology
Urgent: Nan city flood — a 6-hour plan before the flood pulse arrives
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Flood pulse toward Muang Nan — act within 6 hours
- Move cars/motorcycles to high parking · lift appliances · trip the ground-floor breaker
- Survival bag: medicines, documents, 3 L water/person, dry food, torch, power bank
- Move older adults, bedbound patients, and pets to shelters · watch station N.1 (Northern Development Bridge)
- Hotlines: 1784 (DDPM) · 1669 (EMS) · 054-771-888 (Nan rescue) · 1129 (PEA)
If you are warned that a flood pulse will reach Muang Nan within 6 hours, move vehicles and valuables up immediately,
trip the ground-floor breaker, pack a survival bag, and relocate bedbound patients and older adults to a shelter.
Track the Nan River at station N.1 (Northern Development Bridge) and call 1784.
1. The flood path: Bo Kluea and Thung Chang to Muang Nan
Heavy rain on the upper Nan basin — especially
Bo Kluea, Chaloem Phra Kiat, and Thung Chang —
can send a large pulse down the Nan River.
Royal Irrigation Department — water levels
and
CDC — Flood Safety
both stress acting before water arrives in town.
Bo Kluea (~90–110 km) → Chaloem Phra Kiat → Thung Chang (~50–70 km) → Mueang Nan (N.1, Northern Development Bridge) → municipality and riverside communities
Table: hydrology timeline and risk
| Zone (upstream → town) | Distance / time to town (approx.) | Risk | Immediate action |
|---|---|---|---|
| Bo Kluea (farthest headwaters) | ~90–110 km · 8–12 h (rainfall-dependent) | High — volume builds before town | Follow DDPM / loudspeaker alerts · start moving cars and valuables when warned |
| Chaloem Phra Kiat | ~70–90 km · 6–8 h | High | Pack a survival bag · move vulnerable people early |
| Thung Chang | ~50–70 km · 4–6 h | Medium–high | Check N.1 every 1–2 hours · listen to the municipality |
| Mueang Nan (N.1 / municipality) | Reference gauge · 0–2 h after the pulse hits the bridge | Critical — riverside and low communities | Trip the breaker · evacuate vulnerable people · call 1784 / 054-771-888 |
Review symptom severity and get personalized guidance from our Advisory team
2. Six-hour checklist: move, lift, pack
1–2Hours 1–2: lift belongings
Move cars/motorcycles to municipal high parking. Lift ground-floor appliances, power strips, and furniture above past flood marks. Unplug ground-floor devices.
3–4Hours 3–4: survival bag
Daily medicines · ID, land titles, bank books in double zip bags · ≥3 L clean water per person · dry food · torch · power bank · blanket
5–6Hours 5–6: cut power and leave
Trip the ground-floor main breaker before water reaches outlets. Move older adults, small children, bedbound patients, and pets. Do not wait for deep water.
Table: 6-hour emergency action plan
| Window | Main tasks | What to have | Safety |
|---|---|---|---|
| Hour 0–2 | Move vehicles · lift valuables/appliances · unplug ground floor | Cars/motorbikes · waterproof boxes · tarps/zip bags | Do not wade rising water to save things — rubber boots if you must |
| Hour 2–4 | Pack survival bag · photo documents · tell relatives your GPS | Meds · papers · 3 L water/person · dry food · torch · power bank | Keep medicines dry · double-bag documents |
| Hour 4–5 | Check N.1 · listen to loudspeakers · plan the exit route | Radio/phone · shelter map · emergency numbers | Ignore social rumors — DDPM/municipality only |
| Hour 5–6 | Trip the ground-floor breaker · move vulnerable people · lock lower doors (per DDPM) | Rubber boots · rain jacket · whistle · wound antiseptic | Never touch flooded outlets · call 1669 for bedbound patients who cannot move |
3. Cut ground-floor power before water reaches outlets
- Unplug first: fridge, pump, TV, computers on the ground floor
- Main breaker: when water nears outlets, trip the ground-floor main — stand on dry ground, dry shoes
- Do not touch: flooded plugs, poles, or cabinets — water conducts
- PEA: downed lines or leaning poles — 1129
- If someone is shocked: cut power first — do not touch them — call 1669
OSHA — Flood Preparedness
and
CDC — Electrical Safety After a Disaster
: cutting power before outlets flood is among the highest-yield steps against electrocution.
4. Rescue numbers and shelters in Mueang Nan
| Agency | Number | Channel | Help |
|---|---|---|---|
| DDPM (disaster prevention) | 1784 | disaster.go.th | Evacuation, boats/trucks, nationwide risk notices |
| Nan Province rescue | 054-771-888 | Phone / provincial ops center | Rescue and evacuation in Mueang Nan and riverside communities |
| NIEM (emergency medicine) | 1669 | niem.go.th | EMS and hospital transport |
| PEA Nan (electricity) | 1129 | 24h call center | Downed lines, leaning poles, cutting power in risk zones |
| Social help center | 1300 | Line / local Facebook | Children, older adults, disability, bedbound patients |
| Police / fire | 191 / 199 | 1669 app / DDPM | Safety, traffic, fire in flooded areas |
Shelters and high parking (follow Nan Municipality notices)
- High parking: as announced each event — often a stadium, school, or high municipal ground
- Shelters: schools, temples, or community centers opened by the municipality — loudspeakers or Facebook
- Vulnerable people: call 1300 or 1784 for help moving bedbound patients / older adults
Vulnerable groups before the water arrives
- Older adults / bedbound patients: move early — medicines, oxygen if used, medical papers
- Small children: formula, diapers, medicines, water in a child bag
- Pets: collar with a phone number · shelters that allow animals · pet food and water
- Leptospirosis: rubber boots in shallow floodwater · wash wounds after contact
Scientific mechanism: why the first 6 hours matter
By Asst. Prof. Dr. Norawit Raatpiboon:
Rain on a wide catchment is gathered into a peak flow by the time it reaches town.
Water conducts electricity, so
electrical injury
can happen even in shallow water.
Moving belongings and cutting power in the first 6 hours cuts property loss and deaths.
WHO — Floods and health.
FAQ
How long does the pulse from Bo Kluea / Chaloem Phra Kiat / Thung Chang take to reach Muang Nan?
About 4–6 h from Thung Chang, 6–8 h from Chaloem Phra Kiat, 8–12 h from Bo Kluea. Follow N.1 and DDPM.
What must I do in 6 hours after a red warning?
Move vehicles, lift appliances, pack a survival bag, trip the breaker, relocate vulnerable people, watch N.1, call 1784 if you need help.
How do I cut power safely?
Unplug → lift appliances → trip the main breaker before water hits outlets. Never touch flooded plugs. 1129 for lines; 1669 if someone is shocked.
Which Nan hotlines and gauges matter?
1784 DDPM · 1669 EMS · 054-771-888 Nan rescue · 1129 PEA · 1300 · 191/199 · N.1 Northern Development Bridge
Leave or stay?
Evacuate immediately if DDPM/municipality orders it. Otherwise use the 6 hours to pack and move vulnerable people. Do not drive through floodwater or wade where you cannot see the ground.
What goes in a survival bag?
Daily meds, waterproof documents, ≥3 L water/person, dry food, torch, power bank, blanket, antiseptic, dry shoes, emergency contacts.
Support this writing
If this checklist helped you prepare before the pulse arrived, a coffee-sized donation keeps free, cited guides online in Thai and English.
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Citations (E-E-A-T)
Public-safety disclaimer
This is a preparedness guide, not a rescue order, and not a substitute for on-scene officials.
In an emergency follow 1784, 1669, 054-771-888, Nan Municipality, or local officers.
If someone is injured or cannot breathe, call 1669 at once.