Why must new flow paths via ventilation be created with caution?

Creating new flow paths for ventilation during firefighting must be approached with caution primarily because hot gases mixing with oxygen can lead to autoignition. When firefighters open new paths for airflow, they can inadvertently allow a more significant supply of oxygen to reach the superheated gases and materials, creating an environment ripe for combustion. This could lead to rapid fire spread or a flashover, which is a sudden eruption of flames resulting from an increase in temperature and availability of fuel near the ignition point.

Understanding this phenomenon highlights the importance of managing ventilation techniques carefully to prevent putting the firefighters and victims at greater risk while working within the combustive environment of a fire. Proper strategies can ensure that control over the situation is maintained and the dangers associated with sudden flare-ups are mitigated.