DavFlood
DavFloodv1.8.0
  • Map
  • Barangays
  • Reports
  • Hazard
  • Data
Emergency hotlines911

Reference

What the colours mean

A colour is only useful if you know what it costs you. Here is each hazard level in metres, in furniture, and in decisions.

Low

0.1 – 0.5 metres

Shallow flooding

Water reaches your ankles or knees. Streets become impassable to motorcycles and small cars. Anything stored on the floor gets wet.

What to do. Move belongings off the floor. Avoid driving through it — half a metre of moving water can float a small car.

Medium

0.5 – 1.5 metres

Moderate flooding

Water reaches your waist or chest. A single-storey house takes water throughout. Electrical outlets are submerged. Wading becomes dangerous once it moves.

What to do. Evacuate early, before the water reaches this depth. Cut power at the breaker if it is safe to do so.

High

Over 1.5 metres

Deep flooding

Water goes over an adult's head. Single-storey homes are fully submerged. This depth is life-threatening regardless of how well you swim, because of current and debris.

What to do. Do not wait. Evacuate as soon as a storm is forecast — not when the water arrives.

The other hazard: slopes, not water

Most of Davao City by area is mountain — Marilog, Paquibato, Baguio, upper Tugbok. The flood model barely touches that ground, and a blank map there is not an all-clear; it is the wrong hazard for the terrain. What threatens those barangays is the slope itself. Switch on Landslide susceptibility in the map's layer controls to see it.

It works differently from the flood layer in one way worth understanding: there is no storm size and no return period. A slope is susceptible or it is not, on a dry day as much as a wet one. Heavy rain is what triggers failure, which is why this layer is worth reading next to the rainfall panel rather than instead of it.

Low

Low susceptibility

Ground that the model does not expect to give way, but which sits in terrain where landslides happen. Cracks opening in the ground, tilting fences or trees, and doors that stop closing are the signs worth knowing.

What NOAH says about building here. Build only with continuous monitoring.

Medium

Medium susceptibility

The model expects this slope to fail unless it is engineered not to. Heavy or prolonged rain is when that happens — which is why this layer is worth reading alongside the rainfall panel rather than instead of it.

What NOAH says about building here. Build only with slope protection and intervention; continuous monitoring.

High

High susceptibility

The strongest ruling NOAH issues on land: the national assessment says houses should not be here at all. It includes the runout paths of debris flows, so ground that looks flat and safe can be in it because of what is above it.

What NOAH says about building here. No dwelling zone.

Modelled slope susceptibility from UP NOAH — how prone ground is to landslides, not a forecast that one will happen. It carries no storm size and no timing.

A “100-year flood” is not a once-a-century flood

It means a 1-in-100 chance in any given year. Two can land in consecutive years without the model being wrong — the same way rolling two sixes in a row doesn't break the dice. And the risk compounds:

1 year1%
10 years10%
30 years26%
50 years39%

Chance of at least one 100-year flood, assuming independent years.

5-year20%/yr
The flood you can expect roughly every few years. The most useful one for everyday planning.
25-year4%/yr
A serious storm. Bigger footprint, deeper water, more barangays affected.
100-year1%/yr
The worst case in the model. Use it to know where you would go, not where you'd stay.

Common questions

How deep does flooding get in Davao City?
It depends on the place and the size of the storm. The UP NOAH model sorts ground into three bands: 0.1–0.5 metres (ankle to knee), 0.5–1.5 metres (waist to chest), and over 1.5 metres, which is above an adult's head. DavFlood shows which band any point in the city falls into.
What does a 5-year, 25-year or 100-year flood mean?
It is the chance of that flood in any single year, not a schedule. A 5-year storm has a 20% chance each year, a 25-year storm 4%, and a 100-year storm 1%. Two 100-year floods can happen in consecutive years — the name describes probability, not spacing.
How do I check whether my barangay floods?
Open the map and tap your street, or search your barangay by name. DavFlood gives the expected depth at that exact point for the storm size you choose, the ground elevation there, and the nearest public building the model does not flood in that scenario.
Does DavFlood show flooding that is happening right now?
No. DavFlood is a hazard map, not a flood sensor. It shows modelled depth for a storm of a given severity, and it has no gauges, no cameras and no live measurements behind it. For current warnings, follow PAGASA and your barangay's disaster risk reduction office.
What number do I call during a flood in Davao City?
Dial 911. Davao City's Central 911 answers 24 hours for fire, medical and rescue. The City Disaster Risk Reduction and Management Office, which runs preemptive evacuation, can be reached during office hours on (082) 295-2387, (082) 224-2535 or (082) 285-8984.
Where are the evacuation centres in Davao City?
Davao City has not published a complete public directory. In an actual evacuation your barangay opens schools, covered courts and halls that appear on no public list, so the CDRRMO and your barangay hall are the ones to ask. DavFlood shows public buildings the model leaves dry, which is not the same thing.
Where does DavFlood's flood data come from?
The hazard model is UP NOAH's — the University of the Philippines' Nationwide Operational Assessment of Hazards. Rainfall comes from Open-Meteo, river discharge from GloFAS, the basemap from OpenStreetMap, and elevation from AWS Open Data terrain tiles. DavFlood produces none of this data itself.

This is a hazard map, not a flood sensor.

DavFlood shows modelled flood hazard — how deep water is expected to get in a given area during a storm of a given severity. It does not show water on the ground right now. For live warnings, follow PAGASA and your barangay's disaster risk reduction office.

Map view

View angle — tilt to read depth in 3D

0°85°52°