What are the hazards associated with transformer oil in power transformers?

The hazards associated with transformer oil in power transformers include flammability, toxicity, and environmental contamination. Transformer oil can ignite at high temperatures, posing fire risks. Additionally, it may contain harmful substances such as polychlorinated biphenyls (PCBs), which are toxic and can cause health issues upon exposure. Leakage or spills can lead to soil and water contamination, necessitating careful handling and disposal to mitigate these hazards.