What is a common consequence of insufficient ventilation in high-rise evacuations?

Insufficient ventilation during a high-rise evacuation can significantly impact the safety and efficiency of the evacuation process. When smoke and heat accumulate in a confined space, visibility can decrease rapidly, making it difficult for occupants to navigate. This lack of clear sight can lead to confusion and hesitation, causing individuals to slow down as they attempt to find their way to safety.

Furthermore, the presence of toxic smoke can pose health risks, leading evacuees to take additional precautions, such as crawling to avoid inhalation, which can further slow their progress. The cumulative effect of these factors results in a decreased evacuation speed, making it critical for emergency response teams to manage ventilation effectively during fire incidents.