FloodSight Lagos — Live Intelligence

Know Before
the Water Rises

FloodSight uses machine learning and live weather data to predict where flooding is most likely in Lagos — giving residents, responders, and planners hours of advance notice.

View Live Map ↓ How It Works
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⬡ Interactive Risk Map

See Every Street,
Every Risk Level

The map below shows flood risk across Lagos in real time. Taller columns mean higher risk. Red cells are under active flood warning right now. Alert colours factor in both observed rainfall from the last 24 hours and the upcoming 48-hour forecast. Click any cell for details.

◎ Live · Updates every 30 min
◈ Plain-English Guide

What Does Rainfall Actually Mean?

Weather forecasts use millimetres (mm) to measure rain — but that means nothing to most people. Here's what each level feels like on the ground in Lagos.

🌤
Barely Any Rain
0 – 5 mm / day
A few stray drops. You won't need an umbrella. Streets stay dry.
🌦
Light Shower
5 – 20 mm / day
A brief afternoon drizzle. Puddles form quickly but drain within minutes.
🌧
Steady Rain
20 – 40 mm / day
A proper rainy afternoon. Surface water on some roads. Low-lying spots may be soggy.
⛈
Heavy Downpour
40 – 80 mm / day
A serious Lagos storm. Gutters overflow. High-risk areas begin to flood. Drive carefully.
🌊
Very Heavy Rain
80 – 150 mm / day
Many roads flood. Vehicles get stranded. Avoid driving unless essential.
🚨
Extreme Rainfall
150+ mm / day
Among the worst Lagos sees. Severe flooding across the city. Stay home if possible.
⟐ Understanding Alerts

What Should I Do?

FloodSight issues three levels of alert based on the combination of your area's flood risk and how much rain is expected.

✅
All Clear
Rainfall is too light to trigger flooding in high-risk areas. Conditions are safe across all 15 monitored LGAs.
  • Go about your day normally
  • Check again after heavy rain begins
  • Know your nearest high ground just in case
⚠️
Flood Watch
Flooding is possible in elevated-risk areas, especially where drainage is poor. Stay alert and be ready to act.
  • Avoid parking in low-lying streets
  • Keep valuables off the ground floor
  • Monitor conditions — they may worsen
  • Know your evacuation route
🚨
Flood Warning
Flooding is expected in high and very-high risk areas. Take protective action now. Do not wait for water to arrive.
  • Move to higher ground immediately
  • Do not drive through flooded roads
  • Disconnect electrical appliances
  • Contact emergency services if trapped: 112
◎ The Science

How FloodSight Works

Four steps — from raw data to an alert on your phone — running automatically every morning.

🛰
01 · SENSE
Terrain Analysis
We mapped every 100m² of Lagos using satellite elevation data, drainage patterns, and distance to water bodies.
🤖
02 · MODEL
Machine Learning
A trained ML model scores each grid cell's inherent flood susceptibility — independent of any rainfall event.
🛰
03 · INTEGRATE
Dual-Stream Rainfall
We combine what has already fallen (last 24h, via NOAA GFS weather analysis) with what is coming (72h NOAA GFS forecast) — because saturated ground floods faster even in moderate rain.
📱
04 · ALERT
Morning Briefing
Every morning at 6am WAT, an automated SMS briefing is sent to registered responders with the day's flood outlook.
◈ Back-tested on Real Events

FloodSight's Track Record

We tested FloodSight against eight documented Lagos flood events using actual historical rainfall recorded by weather satellites. Here's how it performed.

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⬡ Partner with Rankine

Bring FloodSight to Your Community

FloodSight is an active research project by Rankine Innovation Lab. We are working with local government, NGOs, and community leaders to expand coverage across Lagos and beyond. Get in touch to discuss partnership, data access, or funding.

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