Background: Paying attention to the operational processes of emergency or crisis management has widened in the country that can be cited the legal requirements of the prospectus document at 1404 horizons and the policies of the system related to establishing responsible organizations for crisis management. Business Continuity Management Systems (BCMS) with the requirements of ISO 22301 are factors reducing potential hazards for key activities of the municipality of Tehran. This research describes the standard challenges in the municipality of Tehran's district. Method: In this descriptive-applied research, crisis cases are identified by using questionnaires, interviews, and group seminars through Delphi method. In the following, the important events of crisis were identified based on the relative weighting indicator by analyzing the consequences Business Impact Analysis (BIA) in four major missions such as safety, health, credibility of the organization, and citizens' dissatisfaction. At the final stage of Delphi, the consensus reached its ultimate goal and the unacceptable risk determined by assessing the probability of occurrence and severity of events. Findings: The results showed that the average score was more than mean, if the subject's score on Likert scale was higher than the median, the attitude toward the subject is considered positive. At 99% confidence level, Kolmogorov-Smirnov test was significant (p-value=0. 05). Therefore, a nonparametric test should be used. Spearman correlation coefficients were the largest among the research variables (0. 559). In the risk analysis section, the risk number of disruptive events of vital activity was derived from the probability and severity of the event between 1 to 16. Conclusion: By analyzing the outcomes of Business Impact Analysis ((BIA) from six main operating factors of organization services such as violation of laws, financial damages, environment, social and security consequences, organizational credibility, possible risk of any outcome at stopping the activity is calculated by considering the probability of occurrence and velocity of the event. In order to achieve the first priority of municipality activities, with the Delphi method, in several steps, priorities out of 208 critical activities fell to 56 and 38 respectively. Finally, a final agreement was reached on the 10 main activities and events that were more important included for the first year such as waste collection, snow removal, IT support services, emergency management, management of emergency response, and emergency services. The maximum number of risks obtained for the emergency event is related to lack of coordination between organizations, traffic problems, blocking the roads, lack of preparation and earthquake above six Richter.