Mass Casualty Incidents

Possibly eligible for TCOLE 3881

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Course Goal

To discuss the impact of mass casualty incidents and the hazards for responders, bystanders, and callers.

This course will discuss the implications of a mass casualty incident, cover basic terminology, and types of mass casualty incidents. This course will discuss incident command, processing calls, and the hazards of a mass casualty incident.


Mass casualty incidents will overwhelm responders and Telecommunicators alike.

The incident command structure will be used to ensure responder safety. 

There are many hazards associated with mass casualty incidents.


Course Documentation

  • Online Course Acknowledgement
  • Expectations for Online Students
  • Learning Objectives
  • Mass Casualty Incidents Worksheet



  • MCI Introduction.pdf
  • Video Transcript: 9-1-1 Calls Reflect Chaotic Wisconsin Highway Pileup
  • 9-1-1 calls reflect chaotic Wisconsin highway pileup
  • Knowledge Checkpoint



  • MCI Terminology.pdf
  • Video Transcript: The Golden Hour
  • Dr. Mark McKenney describes trauma care's Golden Hour
  • Video Transcript: Mutual Aid Agreements
  • Mutual aid agreements praised in wake of Mass. explosions
  • Knowledge Checkpoint

Types of MCIs


  • MCI Types.pdf
  • Blast Rocks Manhattan; 29 Injured in Chelsea Explosion The New York Times
  • Knowledge Checkpoint

Incident Command System


  • Incident Command System
  • Video Transcript: Incident Command Structure
  • Incident Command System (ICS) structure.
  • Knowledge Checkpoint

Processing MCI Calls


  • Processing MCI Calls.pdf
  • Video Transcript: 911 Calls Reveal Concert-Goers Terror
  • 9-1-1 Calls Reveal Concertgoers’ Terror during Las Vegas Massacre
  • Knowledge Checkpoint

Hazards of MCIs


  • MCI Hazards.pdf
  • Video Transcript: Residents Describe Scary Scene After Chemical Spills
  • Residents Describe Scary Scene after Chemical Spill
  • Knowledge Checkpoint



  • Conclusion
  • Video Transcript: Hurricane Harvey 9-1-1 Calls
  • Hurricane Harvey 9-1-1 Calls
  • Knowledge checkpoint

Final Exam

  • Mass Casualty Incidents - Final Exam

Course Evaluation

  • Course Evaluation

About Your Instructor

Tina L.  Chaffin

Tina L. Chaffin

9-1-1 Training Specialist

I have over 22 years of experience as a 9-1-1 Telecommunicator/Trainer. I have experience in PSAPs large and small. I currently work part-time in a PSAP to retain my skills and industry knowledge.

I am passionate about training and public education. 

I currently hold the following certifications NENA ENP, APCO RPL, Texas Commission on Law Enforcement Master Telecommunicator and Advanced Instructor, Texas Department of Public Safety TCIC/TLETS Instructor, and National Center for Missing and Exploited Children Instructor.

Learning Objectives

Define a mass casaulty incident.

Recognize terminology related to a mass casualty incident.

List different types of mass casualty incidents.

Explain the incident command system.

Discuss procedures for processing calls realted to mass casualty incidents.

Relate hazards found in mass casualty incidents.