Extensive disaster risk

The risk of low-severity, high-frequency hazardous events and disasters, mainly but not exclusively associated with highly localized hazards.


1. Extensive disaster risk is usually high in cases where communities are exposed to, and vulnerable to, recurring localized floods, landslides, storms or drought. Extensive disaster risk is often exacerbated by poverty, rapid urbanization and environmental degradation.

2. When dealing with infrastructure loss and damage, extensive disaster risk relates to small-scale, local infrastructure systems, rather than large-scale infrastructure.

3. See also “Intensive disaster risk” and "Everyday risk".


UNDRR Sendai Framework Terminology on Disaster Risk Reduction (2023)


Reference for Note 1: UNDRR Sendai Framework Terminology on Disaster Risk Reduction (2023)




Lightning risk in Canada

Lightning is a common hazard in Canada, damaging property and disrupting economic and social activities. Lightning not only impacts human health, it also affects infrastructure systems including electricity generation, transmission and distribution, and also telecommunications. According to some studies, lightning-related damage and disruption costs in Canada range from CA$600 million to CA$1 billion per annum. Forestry and electricity infrastructure damages account for over 85 percent of the total. A deeper effort is needed to evaluate the risk and to develop damage prevention measures, such as the expanded use of the Canadian Lightning Detection Network data by both public and private sector clients.


Source: Mills, B., Unrau, D., Pentelow, L., & Spring, K. (2010). Assessment of lightning-related damage and disruption in Canada. Natural hazards52, 481-499. DOI:10.1007/s11069-009-9391-2