Under what conditions can a flight attendant initiate an evacuation?

A flight attendant is trained to initiate an evacuation primarily when there are immediate and life-threatening conditions that could compromise the safety of passengers and crew. Scenarios such as fire, smoke, and structural damage present clear and present dangers that necessitate a rapid response to ensure the safety of everyone on board. These conditions can escalate quickly, making it crucial for flight attendants to act decisively to prevent harm.

While the other scenarios listed involve situations that could pose risks to safety, they do not typically mandate an immediate evacuation. For instance, weather and turbulence are primarily handled through adherence to protocols and may not require evacuation. Technical issues, passenger conflicts, or delays often involve sorting out operational challenges rather than immediate evacuation needs. Even medical emergencies generally allow for handling onboard rather than requiring an evacuation unless they escalate to a critical level. Thus, fire, smoke, and structural damage are the conditions that clearly indicate a need for quick and immediate evacuation actions.