How can firefighters create new flow paths during structure fires?

Creating new flow paths during structure fires is critically important for managing smoke and heat, as well as improving conditions for both firefighters and potential victims. Advancing a hoseline or ventilating windows effectively alters the air dynamics within a burning structure, allowing fresh air to enter and smoke or heat to exit. This process can help clear the environment, reducing the risk of fire spread and creating a safer environment for occupants and firefighters.

When firefighters advance a hoseline, they not only provide a means to combat the fire directly, but they also help establish a flow path that can facilitate better air movement. Similarly, ventilating windows provides an escape for smoke and heat, effectively drawing fresh air into the structure through aligned openings—this is often referred to as positive pressure ventilation.

Shutting off power to the building may enhance safety, but it does not contribute to new flow paths for air movement. Cooling the exterior walls can help cool the structure's surface but does not effectively alter airflow inside the building. Sealing off areas with tarps may prevent smoke and heat from escaping but does not promote airflow or create new paths. Therefore, the combination of advancing hoselines and ventilating creates practical and effective flow paths that improve conditions during firefighting operations.