Disaster risk profile: Seychelles
This disaster risk profile for Seychelles seeks to provide a basis for the future implementation of disaster risk financing through the improved understanding of disaster risks. The risk modelling undertaken focused on three perils: tropical cyclones, floods and earthquakes. In addition, as part of the earthquake risk assessment, tsunami risk zones were also identified. The hazard and exposure data, as well as the results of the risk analysis, has been collated and stored on open data geospatial platforms in the country and made available to a wide range of end-users.
This analysis suggests that, on average, Mahé and the Inner Islands of Seychelles experience nearly US$2.8 million in combined direct losses from earthquakes, floods, and tropical cyclones each year. However, a specific event such as severe flooding can produce significantly larger losses. For example, results suggest that a 100-year return period flood event could produce direct losses of $16 million and require approximately $3.7 million in emergency costs. Risk estimates and exposure data were not collected for the Outer Islands of Seychelles and are not included here.
In this analysis, flooding is the most significant risk, causing nearly 88 percent of the average loss per year from all three perils. Although infrequent, strong tropical cyclones can cause losses comparable to those of the worst floods.
The results suggest that the residential sector experiences over 50 percent of the combined losses and the commercial sector 35 percent. The highest loss takes place on Mahé Island, which experiences 75 percent of the average annual losses from all perils combined, with the remaining losses occurring on the Inner Islands. In addition to the direct losses, an annual average of over $640,000 is estimated for emergency costs .
Explore further
