Which of the following is a common environmental risk in settlement expansion and urban disasters?

• A. Heat island effects
• B. Increased wildlife biodiversity
• C. Decreased energy demand
• D. Decreased water stress

Answer: (A)

Urban heat island effects occur when urban areas replace natural land cover with dense, heat-absorbing materials like concrete and asphalt and reduce shade from vegetation. This traps heat, raising temperatures in cities, especially at night. In settlement expansion, more impervious surfaces and less green space amplify this warming, making communities more vulnerable during disasters such as heatwaves, power outages, and droughts. The elevated heat stresses health, increases cooling needs, and can worsen air quality, all of which compound disaster risks. This combination of higher temperatures and intensified urban vulnerability is the common environmental risk in expansion and urban disasters, whereas the other options describe outcomes that are not typical risks in this context.