When should a secondary search be performed?

A secondary search should be performed after the fire is under control or fully extinguished to ensure that all areas of the structure have been thoroughly checked for any potential victims or hidden fires. By waiting until the fire is under control, firefighters can operate more safely and effectively, reducing the risk of injury from re-ignition or structural collapse.

Conducting a secondary search at this stage allows for a more detailed and careful examination of the premises, ensuring that no victims have been overlooked and that the environment is secure. It's crucial for firefighters to confirm that all areas, including those that may not have been safely accessible during the primary search, have been investigated.

The other scenarios, such as conducting a secondary search immediately after the primary search or only in the presence of victims, do not account for the need for safety and thoroughness in the search for victims or other hazards.