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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The PERC manual

The PERC manual

The Post-Event Review Capability (PERC) is a systematic framework for the analysis of a disaster...

Zurich’s Post-Event Review Capability: Global lessons for reducing risk and increasing resilience

Zurich’s Post-Event Review Capability:...

Impacts from disasters are getting worse. Yet after a disaster, there is rarely time to learn what...

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...

 

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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

Improve drainage capacities in urban areas

The water drainage network in urban areas should be resized to be able to handle the expected magnitude of future downpours, taking into account the experiences of the recent floods. Under the current conditions an...

Better manage watersheds

Dams may serve as a solution to offer protection, but their long-term effectiveness will depend in large measure on managing the watershed, and especially on reforestation of its slopes. Channels such as oued beds ...

Consider future events, increase redundancy

Levees and hill dams will provide very little protection if their construction only takes into account historic data. Structural devices can provide protection only up to a certain level. For high-intensity events, ...

Learn from past flood events

The knowledge gleaned from events like the November 2014 floods is too often wasted. There should be a dedicated function to look at past events, analyze them, draw the right conclusions and use these to improve th...

Educate the public to understand risk and take the right action ahead of and in times of crisis

According to authorities, it was people’s willingness to take risks – perhaps because of their prior experience in less severe floods – that led to a high number of casualties in Guelmim. A local risk managem...