How are fire classifications determined?

Fire classifications are determined primarily by the materials involved in the fire. Each class represents a different type of burning material, and this classification helps in identifying the most appropriate firefighting strategies and equipment. For instance, Class A fires involve ordinary combustibles such as wood and paper, while Class B fires involve flammable liquids and gases. By understanding the materials that are burning, firefighters can select the correct extinguishers and methods to safely and effectively combat the fire.

While other factors like location or the time of day may influence response strategies or tactics, they do not fundamentally categorize the type of fire itself. The classification system is standardized based on common materials, ensuring that responders are aligned on how to approach various incidents, making it essential for all firefighting personnel to be well trained in understanding these classifications.