Which of the following is a primary cause of structural fires?

Electrical failures are a primary cause of structural fires because they often involve the malfunctioning of electrical systems or appliances. Such failures can occur due to overloaded circuits, faulty wiring, or malfunctioning equipment, leading to overheating, arcing, or sparks that ignite nearby combustibles.

While water leaks, natural disasters, and weather conditions can certainly contribute to fire-related incidents or exacerbate their effects, they are not considered primary causes of structural fires in the same consistent way that electrical failures are. In contrast, electrical issues are a significant and recurring factor in fire investigations, making them a leading cause of structural fires across various types of buildings. Understanding the role of electrical systems in fire safety is crucial for prevention and safety measures in any structure.