Which chief is responsible for the overall operations of the five fire districts?

The Operations Chief is responsible for the overall operations of the five fire districts, as this role typically encompasses all aspects of fire operations, including incident management, resource allocation, and ensuring that emergency services are effectively delivered across all districts. This position requires a comprehensive understanding of the operational needs and challenges faced by each district, including coordination among crews and equipment in various situations. The Operations Chief takes the lead in emergency response strategies, ensuring that the response is swift and organized, which is crucial for effective firefighting and rescue efforts.

The other positions, such as the Training Chief or Public Affairs Chief, have more specialized roles focused on training programs or public relations, respectively. Meanwhile, the Emergency Response Chief would typically focus on specific response scenarios rather than the overarching management of all districts. Therefore, the Operations Chief's integral role in overseeing and coordinating all fire operations makes this the correct choice for the described responsibility.