The consequences of domino effect accidents can be much severe than the primary events. Some past catastrophic disasters that occurred in the process industries are induced by domino effects, such as the 2019 Xiangshui chemical plant explosion, 2009 Jaipur fire, 2009 Cataño oil refinery fire, Buncefield fire, Flixborough disaster, etc. In these accidents, most of the chemical plant is damaged. Part of these accidents resulted in huge casualties. Taking the 2019 Xiangshui chemical plant explosion as an example, it led to more than 78 deaths and 617 injuries, and a huge economic loss. This accident is an external domino effect accident. As a result, a lot of companies and facilities nearby the chemical plant were damaged. In light of the severe consequences of domino effect accidents, more public attention should be paid to protect chemical industrial areas from domino effect accidents.