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

High-resolution maps are needed for aid and rescue organizations.

Local knowledge is criticallyimportant for first responders and emergency teams. In the 2016 floods, especially in Bavaria, responders fromout of town had difficulty with existing maps that lacked certain information whe...

Forecasting of local intense events should be improved.

Warnings, to be effective, require an end-to-endsystem integrated with forecasts. The current lead times for warnings of summer thunderstorms are too shortto allow people to take effective action. In the next five to 10 ...

To effectively communicate, the social context must be understood.

If flood awareness campaigns are tobe successful then they must communicate with their target audience effectively. For example, some stateshave identified the need to provide flood warnings in specific languages: In Bad...

Local, indigenous knowledge should be incorporated into future decisions.

A lot of indigenousknowledge, especially in rural areas, has been lost. This historic knowledge is very important. In low-lying areasin pre-alpine hills in southern Baden-Wu?rttemberg, historic buildings have strongly fo...

Improve understanding of return periods and flood probabilities.

A “100- year flood” is often mistakenly interpreted as a flood of a magnitude that will not occur again for another century. People need to understand that, in fact, it means that there is a 1 percent chance of a flo...