Post-Event Review Capability
Post-Event Review Capability
The award winning Post-Event Review Capability (PERC) methodology was created by Zurich Insurance to provide research and independent reviews of large flood events. It seeks to answer questions related to aspects of flood resilience, flood risk management and catastrophe intervention. It looks at what went well, as well as opportunities for improvement, and results in a set of recommendations for the future.
Use this page to learn about the PERC methodology, read full PERC reports or find specific recommendations.
Zurich focused its initial PERCs on floods because floods affect more people globally than any other natural hazard. However, the methodology can be applied to review and learn from other hazard events. We have recently applied it to study the growing peril of wildfires by reviewing the 2017-18 California fires.
Resilience Lessons from Cyclone Idai and Cyclone Kenneth
The tropical Cyclone Idai and Cyclone Kenneth weather systems, which made landfall in Southeast Africa in March and April 2019 respectively, brought catastrophic destruction and damage to communities across Malawi, Mozambique, and Zimbabwe. The widespread humanitarian disaster resulting from Idai and Kenneth emphasises the need to learn what happened during these events and what can be improved to reduce future risk.
All material from the PERC carried out in Southern Africa by Alliance partners ISET-International, the International Federation of Red Cross and Red Crescent Societies (IFRC), Practical Action, and Zurich Insurance Group - and in collaboration with the Mozambique Red Cross and the Swiss Agency for Development and Cooperation (SDC) is available below, and on ISET-International’s dedicated PERC Idai and Kenneth page.
Using PERC methodology
The Post-Event Review Capability (PERC) is a systematic framework for the analysis of a disaster...
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Impacts from disasters are getting worse. Yet after a disaster, there is rarely time to learn what...
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Hurricane Harvey made landfall near Rockport, Texas on August 25, 2017 as a Category 4 storm. Over...
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PERC Recommendations
Search all the PERC recommendations produced in all PERC reports. Refine your search using the criteria on the left.
Total: 28 results found
Analyze vulnerability so as to provide insights on ways to reduce risks in future
An existing flood wall is being reinforced, and other fixed protection added. The company is also considering adopting so-called ‘mobile’ protection that can go up quickly to protect key installations during floods....
Multiple events could overwhelm resources, which needs to be better planned for.
Multiple stormscould hopelessly overwhelm available resources. This risk has also been identified in other events, such as thestorm ‘Desmond’ in the UK in 2015. This is relevant during months in which catastrophic ev...
Risk reduction requires a multifaceted approach; physical protection and land use planning.
Weirs andlevees do not provide absolute safety and often leave significant residual risk. They can also lull people into afalse sense of security and inadvertently increase risk in the long term. Residual risk that such ...
Following the floods of 2005 Switzerland significantly improved its flood protection and flood risk management structures.
Across cantons, the goal was to better harmonize the regulations governing the flow of the rivers and lake levels to achieve maximum protection where needed most, including in large towns along rivers....
Mitigation is hard, and more is needed
While the mitigation measures worked as designed, many parts of Boulder County did not have adequate mitigation measures, and so the destruction in those areas was severe. Of the fourteen drainages in the City of Bould...