A quantitative assessment of the contribution to industrial risk of domino effect due to overpressure was undertaken by using the damage probability models developed in part I. Two case studies derived from the actual lay-out of an oil refinery were analyzed. Individual and societal risk indexes were estimated both in the absence and in the presence of the domino effects caused by overpressure. An increase of individual risk up to an order of magnitude was found when considering domino effects. (C) 2004 Elsevier B.V. All rights reserved.