Hazardous Materials, Multiple-Casualty Incidents, and Incident Management
Hazardous materials incidents, multiple-casualty incidents (MCIs), and incident management are interconnected topics in emergency response.
Understanding the well-being of EMTs, proper scene size-up, and EMS response to terrorism are essential for effective management of hazardous materials and MCIs.
Knowledge from related areas—such as EMT safety, initial scene assessment, and specialized response protocols—supports comprehensive incident management.
Standard
Understanding operational roles and responsibilities is essential for ensuring the safety of patients, the public, and EMS personnel during incidents.
Incident management involves structured coordination and communication to effectively handle emergencies, especially during multiple-casualty incidents and hazardous materials situations.
Safety protocols must be followed to minimize risks, including proper use of personal protective equipment (PPE), scene assessment, and adherence to established procedures for hazardous environments.
Clear role assignment and teamwork are critical in managing resources and providing care efficiently during complex incidents.
Core Concepts
Recognize hazardous materials incidents by identifying warning signs such as placards, labels, unusual odors, or visible spills, and take appropriate safety actions like isolating the area and notifying specialized response teams.
Identify a multiple-casualty incident (MCI) by assessing the number of patients and available resources; an MCI occurs when patient needs exceed the immediate capabilities of responders.
Understand the Incident Command System (ICS) as a standardized, organized approach to managing emergency incidents, ensuring clear roles, communication, and coordination among responders.
Apply triage principles to prioritize patient care based on severity of injuries, using systems like START (Simple Triage and Rapid Treatment) to categorize patients for treatment and transport.
Manage transportation and staging logistics by organizing patient movement to appropriate medical facilities and efficiently utilizing ambulances and staging areas to avoid congestion and delays.
Address psychological aspects of MCIs by recognizing stress and emotional responses in both victims and responders, and providing support or referrals to mental health resources as needed.
Learning Objectives
Hazardous materials are substances that pose risks to health, property, or the environment, and their management is governed by federal regulations such as OSHA and EPA guidelines.
Hazardous materials incidents can occur during production, storage, transport, or use of dangerous substances, requiring specialized response and training levels (awareness, operations, technician, specialist) that define responder responsibilities at the scene.
EMTs must recognize signs of hazardous materials incidents, control the scene to prevent further exposure, identify the involved substances (using placards, labels, shipping papers, or reference guides), and communicate essential information to resource agencies for expert guidance.
At hazardous materials incidents, EMTs are responsible for rehabilitation operations, caring for injured and contaminated patients, and ensuring proper decontamination procedures to prevent secondary contamination and further harm.
A multiple-casualty incident (MCI) is defined by the number of patients overwhelming available resources, and effective disaster plans should be flexible, well-communicated, and regularly practiced.
Events with increased likelihood of MCIs include natural disasters, transportation accidents, and terrorist attacks, and response effectiveness can be improved through preplanning, training, and coordination.
The Incident Command System (ICS) provides a structured approach to managing MCIs, with clear roles such as Incident Commander, Operations, Planning, Logistics, and Finance, and EMTs may need to establish command if first on scene.
MCIs can have significant psychological impacts on both survivors and responders, necessitating support and mental health resources.
Within the ICS, the EMS branch is responsible for triage, treatment, and transport of patients, using established triage criteria to prioritize care and select patients for secondary triage and treatment.
The staging area is where resources are organized before deployment, while the transport area manages patient movement to hospitals, with supervisors ensuring order and efficiency.
Communication with hospitals during MCIs differs from routine EMS communication, requiring concise, coordinated updates to manage patient distribution and resource allocation.
Key Terms
Multiple-casualty incidents (MCIs) involve situations with many patients, such as explosions, crashes, or natural disasters, requiring special emergency response procedures.
Hazardous material (HAZMAT) incidents present unique dangers and require recognition and specialized assistance beyond standard emergency care.
Incident Command System (ICS) and National Incident Management System (NIMS) are structured approaches used to manage resources, personnel, and procedures during large-scale emergencies.
Zones of operation are established at incident scenes: the hot zone (immediate danger area), warm zone (decontamination area), and cold zone (safe area for support and command).
Key roles in MCIs include the Incident Command, staging supervisors, treatment supervisors, triage supervisors, and transportation supervisors, each responsible for specific aspects of scene management.
Triage is the process of sorting patients based on the severity of their conditions, often using triage tags to identify priority levels.
Staging areas are designated for organizing incoming resources and personnel before they are deployed to the scene.
Surge capacity refers to the ability of the emergency system to manage a sudden increase in patient volume.
Unified command may be used when multiple agencies are involved, ensuring coordinated decision-making and resource allocation.
Hazardous Materials
Hazardous materials (HAZMATs) are common and pose risks to health, safety, and property, especially during transport and storage. You need to recognize HAZMAT situations early and follow local management plans.
HAZMAT incidents can occur anywhere, but are especially likely at factories, railroads, and highways. About 1 million HAZMAT shipments happen daily in the U.S., increasing the likelihood of accidents.
Examples of hazardous materials include benzene (toxic vapors, bone marrow destruction), benzoyl peroxide (fire/explosion risk), carbon tetrachloride (organ damage), diethyl ether (flammable/explosive, respiratory irritant), hydrochloric acid (respiratory and skin damage), hydrogen cyanide (highly flammable, toxic), and vinyl chloride (carcinogenic, explosive). Each material has specific hazards such as toxicity, flammability, explosiveness, and irritant properties.
Specialized training is required to safely respond to HAZMAT incidents. Without this training, your role is to maintain a safe distance and call for expert help, as you cannot safely assess containers or use protective equipment without proper instruction.
Personal safety is paramount in HAZMAT incidents. You cannot assist affected individuals if you are not kept safe yourself; untrained intervention can increase risk to you and others.
Training Required by Law
OSHA and EPA have established regulations to improve the safety and effectiveness of emergency response to hazardous materials (HAZMAT) incidents. These regulations are outlined in OSHA's Hazard Communication Standard (29 CFR 1910.1200).
Employers are responsible for ensuring that all emergency response personnel receive appropriate training and documentation. Training is mandatory for anyone who participates or is expected to participate in HAZMAT emergency response.
OSHA’s HAZWOPER standards define five levels of HAZMAT training:
First Responder Awareness: Recognize hazardous substance releases and initiate a response by notifying proper authorities.
First Responder Operations: Respond from a safe distance to protect people, property, and the environment, and prevent incident escalation.
Hazardous Materials Technician: Directly stop or control hazardous material releases, requiring specialized training.
Hazardous Materials Specialist: Possess advanced knowledge of specific substances and act as a liaison with government agencies.
On-Scene Incident Commander: Manage and control HAZMAT incidents using the Incident Command System and emergency response plans.
Most OSHA training levels are fire service-oriented, but EMS responders should be trained at least to the awareness level, and possibly the operations level, with skills tailored to their roles. The National Fire Protection Association’s Standard #473 addresses EMS competencies for hazardous material incidents.
As an EMT, you are often among the first to arrive at HAZMAT incidents, and your initial actions are critical for the outcome of the response. Maintaining up-to-date knowledge and skills in hazardous materials response is essential due to the dynamic nature of HAZMAT environments.
Responsibilities of the EMT
Recognize HAZMAT incidents quickly by being aware of common locations for hazardous materials, such as highways, chemical plants, trucking terminals, railways, laboratories, and agricultural centers. Awareness of your community’s chemical hazards and participation in joint training with local agencies enhances preparedness.
Do not assume the scene is safe; assess from a distance and avoid impulsive actions. EMTs are at high risk of injury if they rush in. Take a command position, maintain a safe distance, and only allow properly trained and equipped personnel to enter the immediate site.
All patients leaving the incident site should be considered contaminated until proven otherwise. Ensure thorough decontamination before transport to prevent secondary contamination of ambulances and medical facilities.
Call for specialized HAZMAT resources early, as their response may be delayed. Notify fire services, rescue personnel, HAZMAT experts, law enforcement, public utilities, and company experts as appropriate. Much of this can be initiated through your dispatcher.
Control the scene by establishing clear zones:
The hot zone (danger/contamination area)
The warm zone (decontamination corridor)
The cold zone (support area, command post, and staging)
Stay upwind, on the same level, and avoid low-lying or downwind areas to reduce exposure risk.
Implement your agency’s Incident Management System and maintain command until relieved. Establish perimeters, evacuate as needed, and direct bystanders to safety. Do not risk personal safety for rescue attempts.
Identify the hazardous substance safely and indirectly:
Use binoculars to read placards, signs, or labels from a distance.
Look for placards using the NFPA 704 System (diamond with color and number codes for health, fire, reactivity, and specific hazards).
Recognize that placards and shipping documents may be inaccurate; confirm information from multiple sources (e.g., drivers, workers, shipping documents).
Check for DOT-required labels and pictograms (aligned with the UN GHS), and note signal words like “WARNING” or “DANGER.”
Review invoices, bills of lading, shipping manifests, and Safety Data Sheets (SDSs) if safely accessible.
Interview workers or others leaving the hot zone for substance identification.
Use available resources for substance identification and response guidance:
Emergency Response Guidebook (ERG) for chemical names and emergency actions.
CHEMTREC for 24-hour expert advice on hazardous materials.
State and federal radiation authorities for incidents involving radioactive materials.
Be alert for secondary contamination risks—patients can contaminate rescuers and facilities if not properly decontaminated.
Understand that accurate identification is critical for determining risks to the public, rescuers, patients, and the environment, and for guiding initial actions.* Regional poison control centers like EMTREC and CHEM-TEL, Inc. are valuable resources during hazardous material incidents, offering guidance on decontamination and patient treatment.
When seeking advice, you should provide detailed information, including your identity, agency, contact number, the nature and location of the problem, identification numbers of materials (if safely obtainable), and details about the carrier, shipper, manufacturer, consignee, and origin.
You must also describe the container type and size, its storage or transport situation (rail car, truck, open or housed storage), estimate the quantity involved and released, and report local conditions such as weather, terrain, and proximity to sensitive areas like schools or hospitals.
Report any injuries, exposures, and which local emergency services have been notified, and maintain open communication lines at all times.
Do not act hastily based on assumptions about the substance; always seek and follow expert advice and only perform actions you are trained for. If the substance cannot be identified, wait for HAZMAT experts to handle the situation.
Establish a Treatment Area
EMS personnel and equipment must remain in the cold zone at HAZMAT incidents, with responsibilities including monitoring and rehabilitating HAZMAT team members and caring for the injured, as outlined in standard operating guidelines.
Rehabilitation (rehab) operations are essential for HAZMAT team safety, requiring a designated area in the cold zone that is protected from weather, large enough for multiple crews, accessible to EMS, free from exhaust fumes, and allows rapid reentry. Rehab includes medical monitoring (vital signs before, during, and after operations), hydration, rest, and sometimes nourishment, with documentation of all vitals and adherence to local protocols.
Proper hydration and nutrition are critical in rehab, with recommendations to avoid caffeinated beverages and provide foods low in sodium and saturated fats. In cold environments, warm, easily digestible foods are preferred.
Decontamination is vital to prevent the spread of hazardous substances, defined as the chemical and/or physical process to reduce or prevent contamination. Decontamination decisions should be made in consultation with Incident Command, CHEMTREC, poison control, and reference sources.
The decontamination process occurs in the warm zone and involves multiple stations, including mechanical removal of contaminants, gross decontamination (showering/scrubbing), removal and isolation of protective clothing and SCBA, personal clothing removal, full body washing, drying off, medical assessment, and transport.
Field-decontaminated patients may still pose a risk of secondary contamination, especially in hard-to-clean body areas. EMS personnel should use appropriate PPE (e.g., Tyvek coveralls, booties, double nitrile/neoprene gloves) and protect vehicles from contamination by containing runoff.
Disposable equipment should be used whenever possible, as some items may not be able to be decontaminated and must be discarded. Structural firefighting clothing is not suitable for HAZMAT environments.
When treating contaminated patients before HAZMAT team arrival, use PPE, follow Emergency Response Guidebook instructions, manage critical needs (A-B-Cs), irrigate with large amounts of water (preferably tepid/warm), avoid contaminating open wounds, and decontaminate yourself after treatment.
Decontamination should ideally be performed by qualified HAZMAT personnel before EMS contact, but if not possible, patients must be decontaminated at a hospital decon site before entering the emergency department.
Decontamination has two main phases:
Gross decontamination: removes or alters most of the contaminant, but some residue remains.
Secondary decontamination: removes or alters most residual contamination, providing a more thorough process, though some contaminant may still remain.
Seven common decontamination mechanisms:
Emulsification (using surfactants/soaps to suspend contaminants)
Chemical reaction (neutralizing or degrading contaminants; not recommended for living tissue)
Disinfection (destroying microorganisms and toxins)
Dilution (reducing contaminant concentration with solvents)
Absorption/adsorption (contaminant penetrates another substance)
Removal (physical removal by pressure, vacuum, or wiping)
Disposal (aseptic removal and discarding of contaminated objects)
Key objectives for decontamination responders include: selecting appropriate PPE, maintaining an operating time log, setting up and operating the decon line, triaging patients, and effective communication while in PPE.
Essential decontamination equipment includes: buckets, brushes, decon solutions, tubs, dedicated water supply, tarps/plastic sheeting, containment vessels, pumps, A-frame ladders, and appropriate PPE for responders.* Decontamination of patients wearing PPE involves a systematic process: rinse from head down, scrub with a brush focusing on contaminated areas (hands, feet, front), rinse again, assist with PPE removal, and contain hazardous wastewater runoff.
For patients not wearing PPE, responder safety is the top priority; use public address systems, hand signals, or signs to direct ambulatory patients to decontamination lines, considering possible hearing loss from explosions.
Patients should remove all clothing and items that trap contaminants (shoes, socks, jewelry, watches, contact lenses), double-bag clothing for disposal or later decontamination, and bag valuables/ID as appropriate.
Decontamination steps include: a 2- to 5-minute water rinse, dry brushing off solid contaminants before wet decontamination, blotting off viscous liquids, and brushing off water-reactive materials before rinsing.
Rinsing and washing should start at the head to minimize contamination near the nose, mouth, ears, and eyes; after contact lens removal, irrigate eyes, and for open wounds, irrigate from the body core outward, then isolate with plastic wrap.
Use low-water-pressure systems to avoid worsening soft-tissue injuries, prevent overspray, and reduce aerosolization of dry contaminants.
Provide patients with coverings for modesty and protection from the environment, and consider hypothermia prevention during decontamination.
Decontamination is essential to prevent, reduce, and remove contamination for both responders and patients, even though it is not strictly self-protection.
Multiple-Casualty Incidents
A multiple-casualty incident (MCI) is defined by the strain it places on EMS resources, not by a fixed number of patients. The threshold for declaring an MCI varies by jurisdiction, with some areas declaring it for as few as three patients and others for five, seven, or more.
Automobile collisions with three or more patients are the most common type of MCI. Most incidents you encounter will involve three to fifteen patients, while large-scale MCIs are rare.
The key factor in identifying an MCI is when the EMS system’s ability to respond is challenged or overwhelmed by the situation. This means the definition is based on the impact on resources rather than a specific patient count.
MCI response plans must be flexible and scalable. The same basic plan should be adaptable for both small incidents and large-scale events, ensuring a consistent approach regardless of the number of patients.
Multiple-Casualty Incident Operations
Large-scale mass casualty incidents (MCIs) require more time and external support compared to small-scale MCIs, which EMTs can usually manage effectively.
Familiarity with the local disaster plan is essential for all EMTs to minimize difficulties during large-scale MCIs.
A disaster plan is a set of predefined instructions guiding emergency responders on actions to take during specific emergencies.
Key features of an effective disaster plan include:
Addressing events likely to occur in the specific location (e.g., tornadoes in Kansas).
Being well publicized so all responders know the plan and how to implement it.
Being realistic, based on available resources.
Being regularly rehearsed to identify and fix unforeseen issues.
Mass gatherings, such as sporting events, require EMS presence due to the potential for sudden large-scale MCIs from unexpected incidents like explosions or structural collapses.
Understanding your potential roles and the existence of disaster planning resources is important as you enter the emergency medical profession.
Incident Command System
The National Incident Management System (NIMS) is the federally mandated system for managing emergencies in the United States, used by federal, state, and local governments.
The Incident Command System (ICS) is a core component of NIMS, providing a standardized management framework for all types of incidents, especially large-scale emergencies, and is legally required for certain incidents like hazardous materials events.
ICS originated as a tool for managing large-scale firefighting operations involving multiple agencies, and is designed to be flexible for managing people and resources.
ICS is organized into five main components: Command, Operations, Logistics, Planning, and Finance, with Command and Operations being the most commonly used.
The Command function is always established at every incident, with one person responsible for overall management until the incident concludes or command is transferred.
A manageable span of control in ICS is considered to be three to seven people; as incidents grow, Command delegates specific functions to others to maintain effective management.
Two main methods of Command exist under NIMS: single incident command and unified command:
In single incident command, one agency (often fire services) controls all resources and operations.
In unified command, multiple agencies (such as fire, police, EMS, and public works) work together independently but cooperatively, sharing leadership and decision-making.
Unified command is generally preferred for complex, large-scale incidents, as it allows the most appropriate agency to lead at different times and promotes cooperation among all involved agencies.
Think Like an EMT
Incident Command is established by the most senior member of the first emergency service on scene, often EMS, and may be transferred later depending on protocols or unified with other services (police, fire) for coordinated management.
Two main phases at a multiple-casualty incident are scene size-up/triage and organization/delegation: quickly assess the number of patients, hazards, and resource needs, then organize and delegate tasks as resources arrive.
Scene size-up involves identifying the number and priority of patients, hazards, need for extrication, and staging areas for resources; this includes accounting for the “walking wounded” and anticipating additional patients.
Initial communication to dispatch should be concise but informative, including the nature of the incident, number and severity of patients, resources needed, hazards, and a unique Command name for clarity.
Only Command communicates with the communications center and requests resources; subordinates communicate up the chain of command, and face-to-face communication is preferred on scene to reduce radio congestion.
Early and aggressive organization is critical: plan for resource deployment, assign subordinate officers, and establish staging areas to prevent being overwhelmed as backup arrives.
Avoid “freelancing” (uncoordinated activity) by assigning tasks as units arrive; freelancing increases risk of injury or death.
Use tactical worksheets or checklists to organize and track resources, patient priorities, and hospital destinations; these tools help ensure all critical steps are followed and resources are managed efficiently.
Incident Command may include a command staff (public information, liaison, safety officers) on larger incidents to manage information, interagency coordination, and scene safety.
Restrict scene access to essential personnel only to prevent further injuries and maintain control; police or safety officers may take over this function as more resources arrive.
Point of View: Patient
In large multiple-casualty incidents (MCIs), EMS operates as a branch under the Operations section of the incident command system, with increasing need for staff and supervisors as the incident grows in size and complexity.
Key EMS branch functions include extrication strike teams (for trapped victims), staging area (for organizing resources), triage area (for sorting patients by severity), treatment area (for medical care), transportation area (for moving patients to hospitals), and rehabilitation area (for responder recovery).
Incident organization adapts to incident size: small incidents may be managed by a single EMS worker, while medium and major incidents require designated supervisors for staging, safety, transportation, treatment, triage, and rehabilitation, with further delegation to aides and leaders as needed.
Personnel roles are clearly identified, often using brightly colored reflective vests, and EMTs are expected to report to area supervisors, complete assigned tasks, and then report back for further instructions.
Triage systems use visual markers (such as colored ribbons or stickers) to prioritize patient transport and care, with red indicating highest priority for evacuation and treatment.
Triage
Triage is the process of rapidly assessing and prioritizing patients in a multi-casualty incident to maximize survival for the greatest number of people. The most knowledgeable EMS provider acts as the triage supervisor, coordinating personnel, equipment, and resources.
Patients are classified into four priority groups based on severity:
Priority 1 (Red): Treatable life-threatening conditions (e.g., airway/breathing issues, severe bleeding, shock, severe burns).
Priority 2 (Yellow): Serious but not immediately life-threatening injuries (e.g., major fractures, burns without airway involvement, back injuries).
Priority 3 (Green): Minor injuries, "walking wounded" (e.g., minor musculoskeletal or soft-tissue injuries).
Priority 4 (Black): Deceased or fatally injured (e.g., exposed brain matter, prolonged cardiac arrest, decapitation, incineration).
Initial triage involves quickly separating ambulatory (walking) patients (Priority 3) from those needing more urgent care. This is often done by instructing all who can walk to move to a designated area, which helps identify those with airway and circulation and allows focus on more critical patients.
Priority 3 patients may assist with basic care for others if able and provided with appropriate personal protective equipment (PPE).
Treatment is prioritized:
Priority 1 patients receive care first, followed by Priority 2, then Priority 3.
Priority 4 patients are not treated unless resources allow and no other patients are at risk of dying or long-term disability.
Extensive treatment is not performed at the incident site to avoid impeding rescue and care for others.
The START (Simple Triage and Rapid Treatment) method is a rapid triage system using the RPM mnemonic: Respiration, Pulse, Mental Status.
START triage steps: 1. Ask all patients who can walk to move to a collection point (Priority 3, green tag). 2. For non-ambulatory patients, assess: Respiration: If not breathing, open airway. If still apneic, tag as Priority 4 (black). If breathing resumes, tag as Priority 1 (red). If respiratory rate per minute, tag as Priority 1 (red). If , proceed. Pulse: If no radial pulse or capillary refill seconds, tag as Priority 1 (red). If present and refill seconds, proceed. * Mental Status: If unable to follow commands, tag as Priority 1 (red). If alert, tag as Priority 2 (yellow). 3. Reassess Priority 3 patients, as some may deteriorate and require reclassification.
Only three interventions are performed during START triage: opening the airway, controlling bleeding, and elevating an extremity.
Triage categories are color-coded:
Black: Expectant (unlikely to survive, palliative care)
Red: Immediate (requires urgent intervention)
Yellow: Delayed (serious but can wait)
Green: Minor (walking wounded)
START triage should be completed in about 30 seconds per patient, ensuring rapid and efficient sorting in mass casualty situations.
Box 39-1
The START (Simple Triage and Rapid Treatment) system uses color-coded priorities to classify patients during mass casualty incidents (MCIs): Priority 1 (red) for immediate care (altered mental status, absent radial pulse, or respirations >30/min), Priority 2 (yellow) for delayed care (alert, radial pulse present, respirations <30/min), Priority 3 (green) for minor injuries (walking wounded), and Priority 4 (black) for deceased or non-survivable patients (not breathing after airway opened or no pulse and not breathing).
Triage tags are essential for identifying and tracking patients: Tags are color-coded and include spaces for patient identification, medical information, injury locations, vital signs, and treatments. Consistent use of color codes and tags across agencies is crucial for coordination during MCIs.
Alternative marking systems (e.g., colored tape, adhesive labels) may be used, but the color coding must be clear and easily visible to all responders.
The SALT (Sort, Assess, Lifesaving Interventions, Treatment/Transport) method is another triage approach gaining acceptance: It begins with sorting patients by ability to walk or respond, then assessing for life threats and providing rapid lifesaving interventions (e.g., tourniquet for hemorrhage) that take less than one minute.
SALT and the Model Uniform Core Criteria (MUCC) use the following categories: Immediate (red) for those likely to survive with treatment but with critical issues, Delayed (yellow) for serious but not immediately life-threatening injuries, Minimal (green) for minor injuries, Dead (black) for non-survivable injuries or no spontaneous respirations, and Expectant (gray) for those unlikely to survive given available resources.
Patients are moved forward to casualty collection points and then to treatment areas and hospitals based on their triage category.
Secondary triage occurs at treatment areas: Patients are reassessed and may be re-categorized if their condition changes. Treatment supervisors oversee these areas and ensure patients are treated and transported according to updated priorities.
Crew rest and rotation are important during prolonged MCIs to reduce errors and maintain responder well-being.
Effective triage relies on clear communication, adherence to local protocols, and flexibility in using available resources for patient identification and tracking.
Transportation, Staging Logistics, and Communication with Hospitals
Patient transport from the scene to hospitals is organized by triage priority, ensuring that the most critical patients are transported first.
A staging area is established for ambulances, managed by a staging supervisor who tracks vehicles, personnel, and arranges for crew needs such as rest, meals, and rotation.
Ambulances only proceed to treatment areas when requested by the transportation supervisor and directed by the staging supervisor, maintaining order and efficiency.
The transportation supervisor coordinates with treatment areas to determine patient numbers and priorities, then arranges transport to hospitals accordingly, ensuring no ambulance leaves without approval.
Hospitals are notified early about the incident’s magnitude, allowing them to activate disaster plans, call in extra staff, and prepare beds for incoming patients.
Communication with hospitals is centralized through the transportation officer, not individual EMTs, to minimize radio traffic and ensure accurate information transfer.
The transportation supervisor must be aware of each hospital’s capacity, distributing patients to avoid overwhelming any single facility and preventing poor outcomes due to exceeded surge capacity.
After delivering patients, ambulances return to the staging area for further instructions and may bring back supplies as needed.
In large-scale incidents, only basic patient information is communicated to hospitals, such as triage priority and chief complaint, due to the high volume and rapid pace of patient transport.
Psychological Aspects of MCIs
Psychological stress is common among both patients and responders during multiple-casualty incidents (MCIs), even if outward signs are minimal.
Early psychological first aid, such as honest communication, active listening, and acknowledging fears, is crucial for supporting patient recovery.
EMTs should avoid psychoanalysis or making false reassurances, focusing instead on a caring and truthful approach.
Responders themselves are at risk for emotional stress and may require support, including access to stress debriefing counselors.
EMTs who become emotionally incapacitated should be treated as patients, removed from the scene, monitored, and evaluated by a trained professional before returning to duty.