FloodMark is the live, driver-powered flood hazard map. When a car floods, the driver marks the spot in two taps. Every driver behind them sees the pin and routes around the water instead of driving into it.
Launching soon on iPhone and Android.
No app store, no download, no account. FloodMark is a web app: add it to your home screen once and it sits there with its own icon, opens full screen like an app, remembers the last map you looked at, and still shows your last pins when the signal drops in a storm.
Open floodmark.org/app in Safari, tap the Share button, tap Add to Home Screen, then Add. Done — the FloodMark icon is on your home screen.
Open floodmark.org/app in Chrome and tap Install FloodMark when it offers, or open the browser menu and tap Add to Home screen. It installs like an app, because it is one.
The app shell lives on your phone, not just in a tab. It reopens instantly where you left it, keeps the last loaded pins on screen offline, and refreshes the live map the moment you are back in signal.
"Introducing FloodMark.org: See The Water Before You Are In It," the launch ad, live on YouTube now.
Watch on YouTube · Press & media
The Cadillac in the film is real, and so is the water. Richie and Marky Mark went into flooded Port Saint Lucie to rescue it: the golf cart died in the water too, got brought back to life, and the mail still got delivered.
Three moments, one map. The whole system is built around the worst two minutes of a driver's day.
You pull over and tap the big red MY CAR IS FLOODED button. The app grabs your GPS spot automatically. The form opens pre-set to Flooded car, Impassable. Two taps, under ten seconds, and your pin is warning everyone behind you.
You stopped in time and turned around. Tap Report flooding, tap the map where the water is, pick the severity, done. Most pins will come from drivers like you, not from the victim.
Pins show type, severity, how fresh they are, and how many drivers confirmed them. Still flooded keeps a pin alive. It's clear now removes it. Every pin opens in Waze or Google Maps so you can steer around it.
One rule, printed in the app: never report while driving. Pull over first.
A stale flood pin is worse than no pin. So every FloodMark pin carries its own freshness, and the crowd keeps it honest.
Every pin deletes itself after 24 hours unless a driver on the scene confirms the water is still there. Confirmations extend a pin by 6 hours at a time.
Each pin shows exactly how many other drivers confirmed it and when it was last seen. Three confirmations means three people stood there and said the water is real.
The moment the water drains, any driver can clear the pin for everyone. No waiting for an official crew to notice.
FloodMark is not a walled garden. Every active hazard is published in open formats, around the clock, so the warning can travel further than the app itself.
GET /api/feeds/waze.json — incidents in the Waze for Cities partner feed format, ready for Waze to poll.GET /api/geojson — every active hazard as standard GeoJSON for GIS tools, newsroom maps and city dashboards.GET /api/feeds/incidents.json — plain JSON for insurers, towing and roadside fleets, researchers and developers.There is no open API that pushes pins straight into Google Maps or Waze. The real door is the Waze for Cities partner program: approved partners publish a feed in Waze's format, Waze polls it, and the hazards appear in Waze for every driver. Because Google owns Waze, Waze road reports also surface inside Google Maps. FloodMark's feed is already built in that exact format. Inside the app today, every pin already deep-links into both navigation apps.
Flooding is an expensive reminder of what car insurance costs. If you want competing quotes, fill in this form and we will pass your details to insurance partners who can send you offers. This is completely optional and completely separate from marking a flood. Marking a car never sends any of this, and this form never receives your flood report or your exact location, only your ZIP code.
Yes. The app is free for drivers, and the public data feeds are free for cities and community partners.
No. No accounts, no names, no tracking. Your own location is never stored. Only the location of a hazard you choose to report is published, and it deletes itself.
The app is built and heading to the App Store and Google Play now. The live map on this site runs on the same data the moment the backend is switched on.
Waze reports are one of many hazard types in a general app, filed from the driver's seat in traffic. FloodMark is built for the specific moment a car floods: a two-tap parked-car report, severity levels, crowd confirmation, automatic expiry, and an open feed any city or platform can use.