Which fire hazard is represented be an upside down orange triangle with a number 3 in the middle?

An upside-down orange triangle with the number 3 in the middle represents a fire hazard classified as a "Class C" fire, which involves electrical fires. This classification indicates that the fire involves energized electrical equipment and requires specific extinguishing methods, such as using a non-conductive extinguishing agent. It's essential to address such fires with caution to prevent electrical shock or further hazards.