Flood Reports
BETAIs it flooding where you are? One tap puts it on the map for everyone nearby.
NWS · O‘ahu
No flood watch, warning, or advisory for O‘ahu right now
Reports are welcome any time. Streams here rise in minutes, long before a warning is issued.
Uses your phone’s location once, rounded to about 300 m before it is saved. No account needed.
No flooding reported
O‘ahu, last 3 hours
One reportA few reportsMany reportsWater going downRoad blockedNWS warning area
Turn around, don't drown
Reports here are unverified. Treat every one as a reason to slow down, not a reason to go look.
- •Six inches of moving water knocks an adult down. A foot floats most cars. Two feet carries away a truck.
- •Water hides washed-out road, open manholes, and downed lines. If you cannot see the road surface, do not enter.
- •Trapped in a vehicle in rising water: get out and to higher ground. Call 911.
- •Report from where you are safe. Never go closer to the water for a better report.
How the map is made
- •One tap, one spot. Your phone’s position is rounded to a cell about 300 m across before it is saved. The exact point is never stored.
- •People, not taps. A cell is coloured by how many different people report it, not how many times. One person is a grey dot. Two or three turn it amber. Four or more turn it red.
- •It fades. A report counts half as much after 90 minutes and leaves the map after three hours. “Water has gone down” counts against the reports at that spot and turns it green.
- •Against the official picture. When NWS issues a Flash Flood Warning, its outline is drawn under the reports, so a cluster inside it reads as confirmed and one outside reads as news.
- •No account. Nothing to sign up for. A quick check that you are a person, and a limit on how often one phone can report.