Definition: The map shows the geographical distribution and frequency of natural hazards, based largely on historical data: cyclones 1980–2000, droughts 1980–2000, earthquakes 1976–2002, and floods 1985–2003. For the earthquake map, only events with a peak ground acceleration of greater than 2 meters per second were included. For each hazard the frequency within areas at risk has been classified into 10 categories (deciles) with 10 representing the highest frequency and 1 the lowest. White sections represent areas with no reported events and areas excluded from analysis because the population density is less than 5 persons per square kilometer and there is no significant agriculture.
Patterns and trends: The risk of natural disasters, especially cyclones and earthquakes, is highly geographically concentrated. The increasing concentration of people and economic activity in vulnerable coastal plains and urban centers may increase the impact of cyclone and flooding events. This may be further exacerbated if the predicted increase in the frequency and magnitude of extreme weather events, as a result of climate change, materializes.
Significance for infectious diseases: Non-epidemic risks:
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