The disaster management cycle
Disaster risk reduction and management follows a continuous cycle of four phases: prevention and mitigation, preparedness, response, and rehabilitation and recovery. Each phase leads into the next, and recovery feeds back into prevention for the next disaster. The four activities in this item map to one phase each. Relocating households from a riverbank that floods every year removes people from the hazard, so it is mitigation (3). Evacuation drills and pre-positioning medicines at the RHU get the community and the health system ready to act, so they are preparedness (2). Triage of casualties and health services in evacuation centers happen during and right after the event, so they are response (4). Rebuilding the damaged health center to stronger standards is recovery (1). The correct order is 3, 2, 4, 1.
Mitigation versus preparedness
The two pre-disaster phases are the most often confused. Mitigation reduces the hazard or the exposure and vulnerability to it, while preparedness improves the ability to respond when the hazard strikes. Relocation, flood control works, and building codes are mitigation because they lessen the damage a typhoon can do. Drills, early warning systems, stockpiles, and response plans are preparedness because they do not change the damage the flood could cause but make the response faster and more organized.
| Phase | Purpose | Activity in this item |
|---|
| Prevention and mitigation | Reduce exposure and vulnerability | Relocate riverbank households (3) |
| Preparedness | Be ready to respond | Drills, pre-positioned medicines (2) |
| Response | Save lives, meet immediate needs | Triage, evacuation center services (4) |
| Rehabilitation and recovery | Restore and build back better | Rebuild health center stronger (1) |
Where the wrong sequences go wrong
Sequences that begin with drills start with preparedness, although the question asks to start with prevention and mitigation. Placing triage before drills puts response ahead of preparedness, reversing the cycle. A sequence that places relocation after triage treats mitigation as a post-event activity. Watch out! Rebuilding to stronger standards also reduces future risk, but it happens after the event as part of recovery; the principle of build back better links recovery to the next cycle's mitigation.
Exam takeaway
Ask whether an activity changes the damage a hazard can cause (mitigation), readies people to act (preparedness), meets needs during the event (response), or restores services afterward (recovery). For the municipal health plan, the nurse contributes to every phase: mapping vulnerable households, training health workers and residents in drills, organizing health services and surveillance in evacuation centers, and planning the restoration of health facilities.