Typhoon and Flood Season in Central Vietnam: What Actually Happens, and How Care Still Reaches You

Reading a Typhoon Warning

Central Vietnam's storm and flood season runs roughly September through November or December. Within that window, most days are perfectly ordinary, sun, cloud, ordinary rain, punctuated by specific systems that bring a typhoon or tropical storm warning. It's worth knowing what actually happens on the ground when one is issued, because the reality is a lot less dramatic than the word "typhoon" suggests, and a lot more procedural.

Hotels in Da Nang and Hoi An have done this before, often many times a season. What they actually do is straightforward: secure loose furniture on balconies and terraces, tape or board vulnerable windows, stock extra water and food for staff and guests, and, if the storm looks serious, ask everyone to stay off the streets and away from windows for the duration. Front desks are usually the best source of real-time information, better than an app, because they're getting local updates directly.

A few things are worth doing yourself before a warning turns into an active storm. Keep at least 5 days of any regular medication on hand rather than running close to empty, pharmacies may not be reachable once a storm is underway. Charge your phone and any power bank fully. Store some bottled water, since municipal water and power can both be interrupted. None of this requires panic-buying; it's the same short checklist locals run through every season.

If your travel plans involve driving between Da Nang and Hue, note that the Hai Van Pass, the mountain road connecting the two, is genuinely dangerous to drive in heavy rain, with sharp bends, poor visibility and runoff on the road surface. Reschedule rather than push through it during a warning.

During the Alert Itself

Here's the honest part: once a serious storm is actually making landfall, almost nobody is moving on the roads, motorbike taxis stop running, restaurants close, and yes, our doctors stay off the roads too. We won't send a doctor out into conditions we wouldn't drive in ourselves, and if you call during an active alert expecting a visit within the hour, we'll tell you plainly that it isn't happening until conditions ease, rather than promise something we can't deliver.

That doesn't mean you're without options in the meantime. A phone or video call with a doctor still works when the roads don't: we can talk through symptoms, help you decide whether something can wait until the storm passes or needs a hospital now, and advise on managing a fever, an existing condition or a new symptom with whatever you have on hand. If it's genuinely serious, chest pain, breathing difficulty, an injury, call 115 rather than waiting for the storm to pass; ambulances and hospitals are set up to move in conditions a scheduled home visit isn't.

Most alerts are also shorter than people expect. A day or so of staying indoors is the common pattern, not a week-long lockdown, it's the specific hours of heaviest wind and rain that matter, not the whole warning period.

After the Storm: Getting Back to Normal

Once the wind and worst of the rain pass, recovery is usually faster than travelers expect. Streets are cleared on foot and by vehicle within hours in most cases, and normal home visits resume as soon as roads are passable, which our team assesses directly rather than waiting for an official all-clear.

Response times once things are back to normal are the same standing figures as any other day: in Da Nang, most visits happen within 1 to 3 hours of booking; in Hoi An, add roughly 45 to 60 minutes on top of that dispatch time, since doctors travel from Da Nang; in Phong Nha, typically about 1 hour 30 minutes with our local team; in Dong Hoi, typically about 30 minutes, and as fast as 10 minutes for urgent cases. The variable after a storm is how quickly a specific road or bridge clears, not whether the service is running, if a particular route is still blocked, we'll say so and give you a realistic estimate rather than an optimistic one.

Post-Flood Health Risks: Wounds, Leptospirosis, Food and Mould

The health risks that matter most in this season don't come from the storm itself, they come from what's left behind once the water recedes.

Wound care. Floodwater is never clean; it carries street runoff, sewage and animal waste. Any cut or scrape that touches it needs cleaning with soap and clean or bottled water as soon as possible, not a quick rinse and forgetting about it. It's also the moment to check whether your tetanus vaccination is up to date, if you're not sure, mention it to a doctor rather than guessing. For dressing changes and ongoing wound care at your hotel, see our wound care and dressing guide.

Leptospirosis. This is the specific risk worth understanding, because it doesn't behave the way people expect. It's a bacterial infection picked up from floodwater contaminated by animal urine, and you don't need a visible cut to catch it, intact skin exposed to floodwater for a while is enough, though a wound makes it easier. The tricky part is the delay: fever and body aches can show up anywhere between 1 and 2 days after wading through floodwater, or as long as 2 weeks later, which is long enough that people don't connect a fever back to the flood they walked through on holiday. If you develop a fever after any floodwater exposure, even days afterward, even somewhere else on your trip, tell whichever doctor you see "I walked through floodwater." That one sentence changes what they test for.

Food and water safety. Flooded kitchens, contaminated water supplies and interrupted refrigeration during power cuts all raise the odds of food and water-borne illness in the days right after a flood. Stick to bottled or clearly boiled water and freshly cooked hot food until things are confirmed back to normal, particularly at street stalls in the worst-affected areas.

Mould. Once the water is gone, damp buildings dry slowly, and mould sets in fast in the humidity that follows, ground floors, bathrooms and older buildings worst of all. It's mostly a nuisance, but for anyone with asthma or allergies it's a genuine trigger; ask your hotel for a different room if you spot visible mould, and see a doctor if a cough or wheeze isn't settling with your usual medication.

Phong Nha and Dong Hoi in the Off-Season

Quảng Trị province, just south of Phong Nha and Dong Hoi, sees serious flooding between October and November most years, and the same rain affects the wider area. If cave tours are the reason you're visiting, it's worth knowing upfront: Sơn Đoòng doesn't run tours in this window at all, its season is January through August, and other caves in the area close during active flood events, since the rivers that carve them are the same ones that flood them. Multi-day treks into the surrounding national park forest are also where malaria in Vietnam is most worth thinking about, a different risk from the flooding covered on this page, and one tied to jungle exposure rather than the storm season itself.

That doesn't mean there's nothing to do or that the towns themselves shut down. Dong Hoi and Phong Nha stay open and accessible outside of active storms, restaurants, markets and day-to-day life continue as normal between systems. It's specifically the cave tours, not the region, that are seasonal.

If something comes up that's beyond what a home visit can handle, anything requiring imaging, admission or specialist care, Vietnam–Cuba Friendship Hospital in Dong Hoi is the fallback for this area. Our home visits cover assessment, testing, IV fluids and wound care at your accommodation; anything past that scope, we'll tell you directly and point you to the hospital rather than let you wait on us.

Hoi An Specifically: Old Town Underwater

Hoi An is worth its own section because it floods differently from everywhere else on this page. Sitting low on the Thu Bon River, the Old Town genuinely goes underwater most years between October and December, when heavy rain upstream sends the river over its banks. This isn't the same thing as the general storm-season rain covered above, it can happen on a day with no active typhoon warning at all, simply because the river is running high.

When it happens, streets around the riverside market can be knee-deep or more, some residents and visitors get around by boat, and ground floors of riverside homestays and shophouses are affected, furniture gets moved upstairs, shops shift stock to higher shelves, and power to affected ground-floor areas may be cut as a precaution until things dry out. It's a known, managed seasonal event that locals and long-running businesses handle routinely, not a sign that something has gone wrong.

If you're staying in Hoi An during this window, ask your homestay or hotel directly whether your room is on a floor that's affected, and don't assume power and water in a ground-floor room will run uninterrupted during a flood event, it's a reasonable question to ask at check-in, not an unusual one.

Travel Insurance and Documentation

Storms in this season can affect trip cancellations, delayed flights and changed itineraries, and many travel insurance policies have specific provisions for exactly that. If you need documentation of a home visit, a diagnosis, or dates and details of care received for an insurance claim, we can provide that on request, a certificate or summary you can submit alongside your claim. We're a medical service, not an insurer, so we can't tell you what your specific policy covers or advise on how a claim will be assessed; that's a question for your insurance provider directly.

Red Flags, Call 115, Don't Wait It Out

Our service is built for non-emergency and urgent-but-stable care, assessment, testing, IV fluids, wound care and treatment at your accommodation, once it's safe for a doctor to travel to you. Anything on the list above needs a hospital, and needs it now, not after a home visit is arranged.