In the field of physical security during disaster operations,Barriersserve as the primary and most effective catalyst for ensuring security. Barriers—including fences, bollards, jersey barriers, and locked doors—provide "Passive Security" that works 24/7 without the need for human intervention or power. According to theFEMA 430: Risk Management Series, barriers are the foundational layer of the "Defense-in-Depth" strategy. They physically delay or prevent unauthorized access, which is critical during a disaster when manpower is stretched thin and electronic systems (like surveillance cameras) may be offline due to power outages.
WhilePatrols(Option A) andSurveillance(Option B) are vital components of a security plan, they are "Active" measures that depend on personnel and technology. During a major disaster, police and security personnel are often redirected to life-saving missions, and surveillance systems can be blinded by smoke, debris, or technical failure. A physical barrier, such as a concrete wall around a water treatment plant or a temporary fence around a collapsed building site, remains effective regardless of the environment. Barriers serve three main functions:Deterrence(visible discouragement),Delay(slowing down an intruder to allow for a response), andDenial(preventing access entirely).
For aCEDPprofessional, the selection of barriers is a key mitigation and response task. For example, during a mass casualty event at a hospital, physical barriers are used to create "Cordoned Areas" to manage the flow of victims and keep the media or curious bystanders away from the treatment zones. By establishing a "Hard Perimeter" with barriers, the Incident Command can control the scene with fewer personnel. This structural approach to security ensures that "Infrastructure Security" is maintained even in the most austere conditions, providing the stable environment necessary for responders to focus on their primary missions without the constant threat of intrusion or theft of critical supplies.