Which of the following is NOT typically a function of portable fire extinguishers?

Portable fire extinguishers are designed primarily for small fires and are intended to be used by trained individuals to intervene quickly before a fire escalates. Their main functions include suppressing small fires, providing a rapid response to fire incidents, and sometimes preventing fire outbreaks if they are utilized effectively and in the right context. However, extinguishing large structural fires falls outside the intended use of portable fire extinguishers.

Large structural fires typically require specialized firefighting equipment, trained personnel, and extensive fire suppression tactics that portable extinguishers simply cannot provide. They are not designed to handle high volumes of fire or the complexities involved in large-scale incidents. Instead, their role is to address initial, localized fires, making them an important part of fire prevention and safety in settings where such risks are present.