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.

PERC Reports

Using PERC methodology

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Houston and Hurricane Harvey: a call to action

Houston and Hurricane Harvey: a call to...

Hurricane Harvey made landfall near Rockport, Texas on August 25, 2017 as a Category 4 storm. Over...

Zurich Flood Resilience Alliance: Post-Event Review Capability (PERC) Webinar 1

Zurich Flood Resilience Alliance: Post-Event...

Webinar 1/3 on the ZFRA Post-Event Review Capability (PERC) from 14 January 2019: Introduction to...

Zurich Flood Resilience Alliance: Post-Event Review Capability (PERC) Webinar 2

Zurich Flood Resilience Alliance: Post-Event...

Webinar 2/3 on the ZFRA Post-Event Review Capability (PERC) from 18 January 2019: become a forensic...

 

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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: 127 results found

A Strong Social Service Sector Increases Responsiveness

All observers noted that Boulder County is rich in civil society capacity, both formally organized non-profit organizations and non-formal citizen groups. There are a large number of groups, they are diverse in structu...

Redundancy, Modularity and Flexibility help

The existence of two separate water treatment facilities in the City of Boulder allowed safe water to continue to flow even when one plant was knocked out. The existence of a single sewage treatment plant that nearly f...

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...

Mitigation Measures Worked

The system of storm-water mitigation measures worked as designed. The main elements of it were: • Bike paths and underpasses along the creeks to allow additional space for floodwaters; • Tear-away bridges designed...

Emergent organizations allowed thousands of people to help in the clean-up and recovery right from the beginning.

Volunteer management organizations like the Mudslingers and Boulder Flood Relief mobilized hundreds of volunteers with virtually no outside resources. In addition to physical labor, volunteers used their own professional...