Throughout history, there have been many theories about mental health as they relate to trauma and how human beings respond to certain circumstances. What do September 11, 2001, Hurricane Katrina, Hurricane Rita and Operation Iraqi Freedom have in common? These are all traumatic events that have affected millions of people and their families. The events affected them not only physically but also mentally. Today's events have become more devastating and have more mental effects, leading to a new area of ​​study, called Disaster Mental Health. This will be a brief introduction to what disaster mental health encompasses, the theories behind it, and DMH practitioners. Disasters and traumatic events have been captured by individuals for at least two centuries now, dating back to the 1880s. One of the first traumatic events that raised a mental health wake-up call was a train accident in England. There were serious physical injuries, beyond which the medical staff knew there was something else wrong with the victims but could not identify them (Halpern, 2007). These traumatic events and disasters continued to occur but no one determined or considered the psychological consequences. aspect of events. It was not until the First World War that people became aware of the psychological impact of these events. People have started to realize the impact of technological advancements. World War I brought dynamite to the forefront, which proved to have a final effect on the soldiers fighting in the war. Technology has become one of the top trends in disaster mental health. As reliance on technology and its advancements has become more widespread, the consequences for technology failure or malfunction have also increased (Halpern, 2007). Events have become... middle of paper ...... on the well-being of everyone involved in a disaster, victims, first responders and emergency management personnel. They realized that each individual perceives the event in their own way and can be affected at different levels. The need for disaster mental health professionals has increased due to the large number of unknowns surrounding the field as well as the increasing number of disasters around the world. Every day we are affected by disasters or traumatic events. Just yesterday there was a stabbing at a Pittsburgh school where 21 people were stabbed and a lady was involved in a two-vehicle accident, almost losing her life. It is unknown how these people will be affected psychologically, but it will have an impact on them. This is where the field of disaster mental health comes in to help them get their lives back in order..