A structural collapse at a community event has generated a mass casualty incident. Hospitals are surging and the incident is drawing national media attention.
This page walks through the full scenario as written, the action cards and injects a group can use, a sample run-through of how one session played out, and a complete sample HSEEP package (Exercise Plan, Situation Manual, After-Action Report, and Improvement Plan) produced from that session β exactly the kind of documentation your exercise produces automatically.
These locations are plotted on the Incident Map automatically when the exercise begins.
Every scenario, action card, and inject is a hex tile on the response board. Here's the incident card for this scenario β the tile that sits at the center of the board β alongside one of the action cards players place around it.
The Incident Card
Formally activate MCI protocol: START/SALT triage at scene, Casualty Collection Point (CCP) establishment, hospital pre-notification for incoming patient surge, medical branch director assignment, and patient tracking initiation.
An Action Card (Hazard Response)
Players respond to the scenario by placing action cards onto the response board, one per response category arm: Hazard Response, Resources, Communications, Public Information, and Leadership. Each card includes a discussion prompt that drives the group's conversation. Below are the Public Health response cards relevant to this scenario.
Formally activate MCI protocol: START/SALT triage at scene, Casualty Collection Point (CCP) establishment, hospital pre-notification for incoming patient surge, medical branch director assignment, and patient tracking initiation.
βAt what patient count does your MCI protocol trigger β and are you confident your local hospitals can absorb the patients before mutual aid can arrive?β
Open an Alternate Care Site (ACS) to decompress hospital emergency departments. Identify facility, activate healthcare staffing, establish patient intake screening, and coordinate medical supply logistics.
βWhere is your pre-designated ACS, and does it have the medical staffing agreements and supply cache in place to activate within 12 hours?β
For communicable disease events: establish isolation protocols for patients, PPE requirements for responders and healthcare workers, contact tracing initiation, and coordination with infection control specialists.
βWhich first responders and healthcare workers have already been exposed to this pathogen β and what is your protocol for their monitoring, isolation, and continued operational role?β
Coordinate with the Medical Examiner/Coroner on mass fatality operations: scene management, remains recovery priorities, victim identification process, family notification coordination, and temporary storage.
βAt what point does the volume of fatalities exceed your Medical Examiner's capacity β and what is the mutual aid or federal support mechanism for mass fatality events?β
Submit a request through the state for Strategic National Stockpile (SNS) assets: pharmaceuticals, vaccines, medical countermeasures, ventilators, or personal protective equipment. Lead time is critical β request early.
βWhat medical countermeasures do you need in the next 48 hours that are not in your local cache β and have you submitted the state request for SNS already?β
Work with the Hospital Incident Command System (HICS) and regional Healthcare Coalition to implement surge protocols: patient diversion management, discharge acceleration, cancellation of elective procedures, and staffing surge.
βWhat is the actual surge capacity of your regional hospital system right now β and which hospital will hit maximum capacity first if this incident continues at current rates?β
Open and staff a Special Needs or Medical Needs Shelter for residents with medical conditions requiring support beyond a general population shelter. Coordinate with EMS, DOH, and home health agencies for patient intake.
βDo you have the nursing staff committed and the medical supply pre-positioned at your SpNS β and what happens when a shelter resident's medical needs exceed SpNS capability?β
Establish an expedited disease surveillance and case reporting system. Brief healthcare providers on the case definition, required reporting timeline, and the reporting mechanism. Assign an epidemiologist to data management.
βHow long does it take for a clinician who sees a case to report it to your health department β and how does that delay affect your ability to understand the scale of this event?β
Stand up a dedicated public health hotline staffed by trained personnel who can answer questions about exposure, symptoms, treatment access, and protective measures. Provide consistent, accurate answers.
βWhat happens when your public health hotline receives more calls than it can handle β and how do you direct overflow callers to accurate information without them turning to social media?β
Deliver a structured clinical briefing to all hospitals, urgent care centers, and primary care providers in the jurisdiction: case definition, symptoms, diagnosis, treatment protocol, isolation requirements, and reporting.
βHow do you reach private practice physicians and urgent care clinics that are not in your hospital system coordination network β and why does that gap matter for case identification?β
Issue a formal Public Health Advisory with specific, actionable guidance: symptoms to watch for, when to seek care, where to go, and what protective actions to take. Use plain language and multiple languages.
βWhat is the single most important action you want the public to take right now β and is your current public communication making that action clear and easy to execute?β
Open a Point of Dispensing (POD) or mass vaccination site. Coordinate with pharmacy partners, volunteer healthcare professionals, and security. Set up patient flow to minimize wait times and exposure.
βHow many people can your POD vaccinate or treat per hour β and what is the realistic throughput over a 12-hour operational day given your current staffing?β
Monitor and rapidly correct dangerous misinformation about this public health event: false treatments, incorrect transmission routes, unverified case counts. Partner with trusted community voices.
βWhat is the most dangerous piece of public health misinformation currently spreading in your community β and who is the most credible messenger to correct it?β
Declare a Public Health Emergency at the appropriate level (local, state). Understand what legal authorities this activates: quarantine, isolation enforcement, expanded scope of practice, emergency procurement.
βWhich public health emergency powers does your jurisdiction actually have β and which ones require a state or federal declaration before they become available to you?β
Establish direct coordination with the State Health Officer and state health department for resource support, regulatory guidance, media coordination, and escalation to federal partners (CDC, HHS).
βWhat do you need from the State Health Officer that you cannot get through normal channels β and have you made that specific ask directly to their office?β
Injects are mid-exercise complications the facilitator (or any player) can trigger with the β‘ Inject button β up to 3 per exercise. These 5 injects are written specifically for this scenario.
A key piece of operational equipment β a pumper, generator, or mobile command vehicle β has failed mid-operation. No immediate replacement is available through normal channels.
Impact: Capability gap in active operations; tasks dependent on the equipment must pause or be re-routed
Several thousand residents with no evacuation order have self-evacuated and are converging on shelters. Traffic is gridlocked and shelters were not sized for this volume.
Impact: Shelter capacity overwhelmed; evacuation routes gridlocked; unplanned resource demand across multiple sites
Over 200 volunteers have shown up unannounced at the staging area. Some are trained, most are not. They are creating access control problems and a potential safety liability.
Impact: Logistics congestion at staging; safety and liability exposure; significant potential resource being wasted
A physical altercation between shelter residents has injured two people and the shelter manager is requesting law enforcement and asking whether to close the shelter.
Impact: Shelter security compromised; residents feeling unsafe; potential shelter closure displacing hundreds
The regional trauma center has declared a diversion β no incoming patients. Remaining hospitals are filling. EMS is holding patients in the field with no available receiving facility.
Impact: EMS system at risk of gridlock; patients in field without definitive care; medical operations plan must be revised
The following is a hypothetical narrative of one group's session with this scenario β it sets up the sample HSEEP package below, which documents this run-through as if it were a real completed exercise.
A group of four β an Incident Commander, an Operations Section Chief, a Public Information Officer, and a Logistics Section Chief / EOC Liaison β selects the All-Hazards Base Deck and the βMass Casualty Incident with Surgeβ scenario, with the team experience level set to Intermediate. The scenario is revealed: a grandstand has collapsed at the county fairgrounds during a public event, with an estimated 200 injuries and 15 critical patients. All three regional hospitals are within 20 minutes of diversion, a helicopter landing zone has been established but the weather ceiling is dropping, four news helicopters are already overhead, and families are converging on the scene with no reunification site established.
The group's first placements focus on getting ahead of the medical surge. On the Hazard Response arm they place Activate Mass Casualty Incident (MCI) Protocol β triggering a discussion about where their START/SALT triage threshold actually kicks in β followed by Activate Fatality Management Operations, since 15 critical patients makes fatalities a near-certainty. On Resources they place Coordinate Regional Hospital Surge Capacity, debating which of the three hospitals will hit capacity first. Communications gets Establish Public Health Information Hotline, Public Information gets Issue Public Health Advisory and Protective Guidance, and Leadership places Activate Public Health Emergency Authority to unlock expanded procurement and mutual aid authorities early.
About 15 minutes in, the facilitator triggers Mass Self-Evacuation Surge: families with no evacuation order are self-evacuating toward shelters that weren't sized for this volume. The group realizes they never addressed the reunification gap called out in the initial conditions β there is no reunification site, and families are converging directly on the incident scene, interfering with operations. In response they place Activate Medical Needs Shelter Operations on Resources, and the discussion surfaces a real gap: the jurisdiction has no pre-designated reunification site for an event of this type.
Around the 30-minute mark, Critical Hospital at Capacity hits: the regional trauma center declares diversion entirely, and EMS starts holding patients in the field. The group places Activate Alternate Care Site on Hazard Response and debates which facility could realistically stand up an ACS within a few hours β landing on a nearby high school gymnasium identified in their EOP, but acknowledging the medical staffing agreement to support it has never actually been signed.
Near the 50-minute mark, Shelter Conflict & Security Incident is triggered: a physical altercation at the medical needs shelter has injured two people, and the shelter manager is asking whether to close the shelter entirely. The group has no documented protocol for law enforcement response inside a shelter and spends several minutes debating it live β ultimately deciding to request a deputy be posted at the shelter rather than close it, but flagging this as a clear gap for the debrief.
With about 15 minutes remaining, the group clicks Finish & AAR. Each participant completes an individual self-assessment, and the AI debrief generates a structured summary highlighting what went well, the three gaps surfaced during the injects, and NIMS-aligned recommendations. The sample HSEEP package below documents this session end to end.
This is the live response board component β drag to pan, scroll to zoom.
The moment the group clicks Finish & AAR, this screen appears β a record of everything placed on the board plus an AI-generated debrief, generated automatically from the session above.
The group activated MCI and fatality management protocols immediately and secured expanded emergency authority early. Each of the three injects surfaced a planning gap the team hadn't previously identified β family reunification, Alternate Care Site staffing, and shelter security β giving the group concrete, real findings to carry into their improvement plan.
The session demonstrated alignment with NIMS/ICS principles throughout: roles mapped to ICS positions, action cards were tagged to NIMS components and ESF-8, and the gaps surfaced above are carried into the Improvement Plan in accordance with HSEEP doctrine.
This is a complete sample of the documentation package your exercise produces β based on the run-through above. Every real session generates its own version of these four documents automatically.
| Sponsoring Organization | Alachua County Emergency Management |
| Exercise Type | Discussion-Based Tabletop Exercise (TTX) |
| Scenario Deck | All-Hazards Base Deck β Mass Casualty Incident with Surge |
| Location | County EOC, Conference Room A |
| Duration | 90 minutes |
| Participating Organizations | County Emergency Management, County Health Department, Regional Hospital System, Fire Rescue / EMS, Sheriffβs Office, Joint Information Center |
This exercise addresses the Public Health, Healthcare, and EMScapability gap identified in Alachua County Emergency Management's 2025 Threat and Hazard Identification and Risk Assessment (THIRA) for the Public Health β Mass Casualty / Medical Surge threat category.
A structural collapse at a community event has generated a mass casualty incident. Hospitals are surging and the incident is drawing national media attention.
Initial Conditions
Key Stressors
You are part of a small group operating as an independent emergency management team responding to this scenario. Respond as you would in your real-world position, drawing on your actual plans, authorities, and available resources. There are no wrong answers β the goal is open discussion and honest assessment of current capabilities.
The following action cards were placed by the group during this session, organized by response category.
| Hazard Response | Activate MCI Protocol; Activate Fatality Management Operations; Activate Alternate Care Site |
| Resources | Coordinate Regional Hospital Surge Capacity; Activate Medical Needs Shelter Operations |
| Communications | Establish Public Health Information Hotline |
| Public Information | Issue Public Health Advisory and Protective Guidance |
| Leadership | Activate Public Health Emergency Authority |
| Time | Inject | Team Response |
|---|---|---|
| ~15 min | Mass Self-Evacuation Surge | Activated Medical Needs Shelter Operations; identified no pre-designated reunification site |
| ~30 min | Critical Hospital at Capacity | Activated Alternate Care Site at a high school gymnasium; flagged unsigned medical staffing agreement |
| ~50 min | Shelter Conflict & Security Incident | Requested deputy posted at shelter; no documented law enforcement protocol for shelters |
Strengths
Areas for Improvement
Recommendations
The session demonstrated alignment with NIMS/ICS principles throughout: roles mapped to ICS positions, action cards were tagged to NIMS components and ESF-8, and the gaps surfaced above are documented below in the Improvement Plan in accordance with HSEEP doctrine.
| Capability Gap | Corrective Action | Responsible Party | Target Completion |
|---|---|---|---|
| Mass Care β Family Reunification | Identify and pre-designate reunification sites at top high-occupancy venues; develop activation SOP | County EM + American Red Cross | 90 days |
| Public Health, Healthcare, and EMS β Alternate Care Site Staffing | Execute medical staffing agreement for the designated Alternate Care Site | County Health Department | 120 days |
| On-Scene Security β Shelter Security Protocol | Develop joint shelter security SOP with law enforcement covering response, de-escalation, and closure criteria | Sheriffβs Office + Mass Care Branch | 60 days |
The free demo lets you run this scenario β or any other in the library β as a complete exercise with a real AI debrief. No account required.