Asia-Pacific: Tropical Storm Risk (December 2014)

Tropical Storm Risk Zones

This map was derived from the Munich Reinsurance Company's World Map of Natural Hazards and shows tropical storm intensity based on the five wind speeds of the Saffir-Simpson Hurricane Wind Scale.

The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 rating based on a hurricane's sustained wind speed. This scale estimates potential property damage. Hurricanes reaching Category 3 and higher are considered major hurricanes because of their potential for significant loss of life and damage.
Category 1 and 2 storms are still dangerous, however, and require preventative measures. In the western North Pacific, the term "super typhoon" is used for tropical cyclones with sustained winds exceeding 240km/h.

The zones indicate where there is a 10% probability of a storm of this intensity striking in the next 10 years.

UN Office for the Coordination of Humanitarian Affairs:

To learn more about OCHA's activities, please visit