Impeding Recovery: Some critical infrastructures (such as safe passages) and lifelines (such as water supply systems, power systems, etc.) in the accident area may also be destroyed, which will greatly hinder the efficiency and effectiveness of emergency management. The occurrence of subsequent hazards can significantly hinder the recovery of the system performance of CPI to the safety zone, and intensify the attenuation to the collapse zone. Typical scenarios include: large-scale crosscategory hazards coupling scenarios and fire-explosion-toxicant leaks .