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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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...

Zurich Flood Resilience Alliance: Post-Event Review Capability (PERC) Webinar 3

Zurich Flood Resilience Alliance: Post-Event...

Webinar 3/3 on the ZFRA Post-Event Review Capability (PERC) from 23 January 2019: review,...

 

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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: 88 results found

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 ...

Invest more in understanding and mapping small-scale processes.

Water is not the only reason for flooddamage. Particularly when it comes to small watercourses, better understanding is needed of how additionalprocesses contribute to the flood. Obstructions that can form at underpasses...

Prioritize risk reduction based on risk assessment. Don’t focus only on large waterways or arbitrary ‘return’ periods.

Germany’s current policies and decisions on flood protection focus mainly on large riversystems. Investments are made with a goal of protecting assets up to a level with a set period of return (typicallya one-in-100-ye...

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....

Limits of our imagination

Planning for disaster often means implementing measures that would have helped in the last disaster. While learning from experience is critical, looking backward can often limit our imaginations as to what future disas...