Final answer:
Single-parent families, children, and substance abusers are among the populations most at risk for disruption after a disaster, due to factors like limited resources and specific vulnerabilities. Disaster planning often overlooks their needs, increasing their risk during natural events.
Step-by-step explanation:
The populations at greatest risk for disruption after a disaster include single-parent families, children, and substance abusers. These groups are vulnerable due to factors such as limited resources, dependency, and reduced capacity for self-help or mobilization in times of crisis. Disaster planning often overlooks the specific needs of these populations, leading to higher risk and impact during natural disasters.
For example, Hurricane Katrina highlighted the disparity in evacuation plans for residents without personal transportation, which predominantly affected black communities. Additionally, environmental fluctuations and the increasing number of people living in vulnerable areas contribute to the heightened risk of these populations facing devastating effects from natural disasters.