This document is the second addendum to the OECD’s Guiding Principles on Chemical Accident Prevention, Preparedness and Response to address Natural Hazards Triggering Technological Accidents (Natech).
It contains guidelines regarding the prevention and response to technological accidents caused by natural disasters. It also contains a new chapter to provide more detailed guidance on Natech prevention, preparedness and response. The addendum has been developed as a supplement to the second edition of the OECD Guiding Principles for Chemical Accident Prevention, Preparedness and Response, published in 2003. It takes into account the results of the Workshop on Natural Hazards Triggering Technological Accidents (Natechs) Risk Management held on 23-25 May 2012, in Dresden, Germany that was held under the auspices of the OECD Working Group on Chemical Accidents (WGCA).
You can consult the document here.