Decision Support
Early Warning & Priority Risk Overview
Joint flood and landslide probabilities, population exposure, and infrastructure accessibility combined into a single priority score per district, translated into graded alerts with recommended actions.
Active alerts
6
Critical-risk districts
4
Population exposed
680,000
Avg. model confidence
87%
Joint risk priority by district
Higher score = higher combined flood + landslide priority
LowMediumHighExtreme
Colombo87
Kalutara87
Ratnapura87
Nuwara Eliya87
Gampaha62
Kegalle36
Issued alerts
ColomboExtreme
KalutaraExtreme
RatnapuraExtreme
Nuwara EliyaExtreme
GampahaMedium
KegalleLow
District risk register
Full breakdown of flood and landslide exposure feeding the priority score above.
| District | Flood risk | Landslide risk | Population exposed | Priority score | Recommended action |
|---|---|---|---|---|---|
| Colombo | Extreme | — | 232,000 | 87 | Issue evacuation order for exposed low-lying/slope zones |
| Kalutara | Extreme | — | 121,000 | 87 | Issue evacuation order for exposed low-lying/slope zones |
| Ratnapura | Extreme | — | 69,000 | 87 | Issue evacuation order for exposed low-lying/slope zones |
| Nuwara Eliya | — | Extreme | 47,000 | 87 | Issue evacuation order for exposed low-lying/slope zones |
| Gampaha | High | — | 168,000 | 62 | Issue amber advisory; monitor rainfall thresholds closely |
| Kegalle | Medium | — | 43,000 | 36 | Routine monitoring; no active alert required |