As flooding hit Bangkok and the surrounding provinces, Phonlawat Sirajindapirom, Co-Founder & CEO of RevisionSuccess, built a real-time flood photo map called Tuammai (tuammai.com). Tuammai (ท่วมไหม, Thai for "is it flooded?") shows people what the roads actually look like, suggests the best route around flooded spots, and points to free parking and shelters nearby. It is free to use from September 27, 2026.
Tuammai grew out of the question on every Bangkok resident's mind during the floods: is the route to where I need to go flooded, and can a car get through? Weather forecasts only give rainfall in millimetres, and the real information is scattered across group chats and news feeds. Tuammai brings the answers together on a single map. It is built for people in Thailand, free to use, and not run for profit.
"When the floods came, I wasn't sure which roads my car could get through without damage. Yet Bangkok already had thousands of flood photos that people had reported through Traffy Fondue, each with a location and a time, and no one had put them on a map for everyone to see. So I built Tuammai, so that everyone can know before leaving home which routes are safe to take. If it saves one person from driving into water they cannot see, it was worth it," said Phonlawat Sirajindapirom, Co-Founder & CEO of RevisionSuccess.
Phonlawat Sirajindapirom, Co-Founder & CEO of RevisionSuccess
Directions that avoid the flooding
The standout feature is flood-aware directions. Enter a destination and Tuammai shows every reported flood point along the way and suggests the best route, so you can plan before you leave home instead of running into water halfway there.
A live map of flood photos
At the heart of Tuammai is a live map of flood photos. It continuously pulls in the flood reports people file through Traffy Fondue, the Bangkok Metropolitan Administration's reporting platform, and places every photo on the map where it was taken. At the time of writing there are more than 9,000 of them. Tap a photo to see it full size with the time, the address and the reporter's note, filter by district or time range, and share a link instantly.
The photo list beside the map: the newest reports first, each with its district, how long ago it was taken and where it came from
Add a photo from the flood
People standing at a flooded spot can add a photo to the map in about 20 seconds: take it with the live camera, say how deep the water is, and say whether cars, motorbikes or people on foot can get through. Photos from the gallery are not accepted, so every photo was taken at the real place and time.
Free parking, shelters and emergency numbers
Tuammai also gathers the free parking that agencies and malls have opened for people moving their cars to high ground, along with the temporary shelters set up by the Bangkok Metropolitan Administration. Each one lists its capacity, opening hours, who runs it, a phone number and a button for directions in Google Maps, and every entry cites the announcement it came from.
1 / 2A free parking site on Tuammai: Suvarnabhumi Airport long-term car parks, zones C and E, run by Airports of Thailand, with capacity, opening date, phone number and directions
An Emergency tab gathers the numbers for police, fire and rescue, emergency medical services, the Erawan Center, the Bangkok 1555 hotline and the disaster hotline, each one tap to call.
The Emergency tab: police, fire and rescue, medical emergency, the Erawan Center, the city's 1555 hotline and the disaster hotline, each with its agency's seal and one tap to call
A website, no app to install
What sets Tuammai apart is that it is a website, with no app to install. It works in Thai and English, needs no sign-up, does not track its users, and keeps your location on your device unless you choose to submit a photo. Use it at tuammai.com.
One thing Tuammai is not is a reporting channel. To report flooding to the city, use Traffy Fondue or call 1555. In an emergency, call 191, 199 or 1669.
Why an education company built a flood map
RevisionSuccess builds AI-native learning tools for more than 100,000 students across RevisionSuccess and TuaTueng. Nothing about that says flood maps. But the people who build those tools live in this city, and this week the most useful thing any of us could build was a way to see the water.
Tuammai is 100% free to use.
If you are in Bangkok this week, open tuammai.com before you leave the house. And if you find yourself standing in water, take one photo. Someone behind you needs it.
