ABSTRACT
Natural catastrophic events may be able to affect the integrity of industrial structures and possibly lead to loss of control of production processes. As a consequence, if industrial facilities store large amount of hazardous materials, accidental scenarios as fire, explosion, or toxic dispersion can be triggered, thus possibly involving population living in the close surrounding or in the urban area where the industrial installation is located. Eventually, the analysis of natural-technological mutual interaction (Na-Tech) is necessary for the development of methodology for risk management practice, for risk assessment and for emergency planning. On the other hand, simplified tools are mandatory because the number of possible scenarios is often dramatically high when large installations or areas are considered.
