The decision to stop a live event is one of the most consequential choices an organizer can make. Done too early or without cause, an unscheduled stop can itself create hazards—a confused, moving crowd in poor lighting, performers off-stage, and staff unsure of their roles. Done too late, the cost can be measured in lives. This article covers the planning, protocols, and authority structures that govern the decision to stop or evacuate a live event.

The Hazard of the Unscheduled Stop

An unscheduled event stop is not a neutral act. NIMS guidance recognizes that crowd behavior during an unplanned disruption is itself a significant hazard—particularly when audiences have not been informed, egress routes are not yet staffed, or emergency services have not been positioned (Federal Emergency Management Agency [FEMA], 2017). OSHA’s Emergency Action Plan standard (29 CFR 1910.38) requires that any plan for emergency evacuation designate the types of evacuations and the conditions under which each is used—an obligation that applies equally to event organizers employing workers at the venue (Occupational Safety and Health Administration [OSHA], 2016).

This does not mean organizers should hesitate when intervention is necessary. It means the decision must be pre-planned, the authority must be pre-established, and the communication must be pre-scripted—so that when the moment arrives, the response is coordinated rather than reactive.

Who Makes the Decision?

The major incident plan must state explicitly who has the authority to stop the event (FEMA, 2010). NIMS requires that authority be assigned to a specific named position with clear succession—not left to whoever happens to be on the radio. This is typically the Event Safety Coordinator or a designated Incident Commander, with a named backup if the primary is unavailable.

There are circumstances in which public safety agencies, not the event organizer, will initiate action. Under NIMS Unified Command principles, when law enforcement has received credible threat information or a device has been found, the senior law enforcement officer present may direct the stop or evacuation of the event. All event personnel must know in advance that law enforcement direction supersedes event organizer authority in those circumstances (FEMA, 2017).

Stopping vs. Cancellation vs. Evacuation

These are three distinct scenarios requiring different pre-scripted responses:

• Stopping and restarting: the event is paused and expected to resume. Audience members typically remain in the venue. PA messaging must manage expectations and prevent panic-driven movement.
• Cancellation: the event will not continue. The audience must be dispersed in an orderly manner. Property may be abandoned, people stranded, and refund or ticketing questions will arise immediately. Written audience statements and press releases should be prepared in advance (FEMA, 2010).
• Emergency evacuation: audience members must leave the venue immediately due to a safety threat. This is the highest-stakes scenario and requires pre-planned exit routes, staff assignments, PA scripts, and assembly point procedures verified under NFPA 101, Life Safety Code (National Fire Protection Association [NFPA], 2021).

Both stopping and evacuation are scenarios that must be pre-planned and, as far as practical, rehearsed before the event opens (FEMA, 2010).

Lessons from the Field

The Indiana State Fair stage collapse on August 13, 2011 killed seven people and injured dozens. An after-action review found that weather monitoring data indicating dangerous wind conditions was available before the collapse, but no pre-established protocol existed for weather-related event stoppage with a clear decision-maker identified (Indiana State Fair Commission, 2011). The absence of a documented, tested stopping protocol was a direct contributing factor.

The Astroworld Festival tragedy in November 2021 killed ten attendees. The Texas Task Force on Concert Safety (2022) found that the absence of pre-established stopping triggers and clear authority for escalation decisions contributed to the delayed and ultimately inadequate response. The task force recommended that events above defined thresholds include written event-stopping protocols as a condition of permitting, with authority assigned to a named individual who has direct communication with law enforcement.

Building the Stopping Protocol

An effective event-stopping protocol, as outlined in FEMA’s Special Events Contingency Planning Job Aids Manual (2010), answers these questions before the event opens:

• Who holds authority to stop the event? Who is the named backup?
• What observable conditions or thresholds trigger consideration of a stop?
• What is the notification chain once the decision is made?
• What are the pre-scripted PA announcements for each scenario?
• What coded signals alert staff without alarming the audience?
• Where are the assembly areas, and how does crowd flow to them?
• What happens to performers and crew during a stop or evacuation?

NFPA 101 (2021) requires that assembly occupancy emergency plans include specific procedures for notification of occupants, coordination with emergency services, and accounting for all persons after evacuation. These requirements apply to events in assembly occupancies and are enforced by the Authority Having Jurisdiction (AHJ).

References

Federal Emergency Management Agency. (2010). Special events contingency planning job aids manual. U.S. Department of Homeland Security.

Federal Emergency Management Agency. (2017). National Incident Management System (3rd ed.). U.S. Department of Homeland Security.

Indiana State Fair Commission. (2011). After action report: Indiana State Fair stage collapse. State of Indiana.

National Fire Protection Association. (2021). NFPA 101: Life safety code. NFPA.

Occupational Safety and Health Administration. (2016). 29 CFR 1910.38: Emergency action plans. U.S. Department of Labor.

Texas Task Force on Concert Safety. (2022). Final report of the Texas Task Force on Concert Safety. Office of the Governor of Texas.