Which of the following factors may decrease a victim's ability to escape safely during a fire?

The age and health of an individual can significantly impact their ability to escape safely during a fire. Older adults may experience reduced mobility, slower reaction times, or pre-existing health conditions that can hinder their ability to evacuate quickly. Additionally, individuals with health issues, such as respiratory problems or physical disabilities, may struggle to navigate through smoke, heat, or obstacles in their path, making escape more challenging during a fire emergency. Understanding the vulnerabilities associated with age and health is essential for planning effective fire safety measures and ensuring that special considerations are made for at-risk populations during emergencies.

The other factors listed do not directly influence a victim's ability to escape in the same way. The presence of a fire alarm typically aids in alerting individuals to the danger, while weather conditions generally do not play a role within the immediate context of a building fire. Lastly, while certain building materials could affect the fire's intensity or the structural integrity of the building, they are not as significant in terms of an individual’s personal ability to escape.