What are the three primary types of hazards encountered in urban search and rescue operations?

• A. Chemical, Biological, Radiological
• B. Physical, Environmental, Atmospheric
• C. Thermal, Electrical, Mechanical
• D. Social, Political, Economic

Answer: (B)

In urban search and rescue, safety hinges on recognizing three broad hazard families: physical, environmental, and atmospheric. Physical hazards come from the structure and debris—unstable floors, collapsing walls, shifting rubble, exposed nails, sharp edges, hidden voids, and trip or crush dangers that threaten stability and entrapment. Environmental hazards cover conditions like heat or cold stress, humidity, dust, poor visibility, wet or slippery surfaces, and high noise or vibration that affect worker performance and well-being. Atmospheric hazards involve toxic or flammable gases, oxygen deficiency, smoke, vapors, and explosive atmospheres; these demand gas monitoring, ventilation, respiratory protection, and sometimes confined-space procedures.

This framing is especially useful because it aligns with how risk at a collapse scene is systematically assessed and controlled, guiding PPE choices, monitoring needs, ventilation strategies, and scene management. Other options describe hazards that, while relevant in certain incidents, aren’t the broad categories used to categorize on-scene risks in most urban collapses.