Which term best describes an incident requiring an immediate response due to danger of loss of life?

The term that best describes an incident requiring an immediate response due to a danger of loss of life is "Emergency." This term specifically refers to situations that pose an immediate threat to an individual's life, health, or safety, necessitating swift action from public safety agencies. In emergency scenarios, the urgency and severity of the situation demand quick decision-making and response to mitigate risks to life.

While "Priority" may imply importance, it does not inherently convey the critical urgency associated with life-threatening situations. "Eminent" typically refers to something that is about to happen or is impending but does not specifically denote an emergency context. "Fast" describes the speed of response rather than the seriousness of the incident. Thus, the term "Emergency" accurately captures the essence of scenarios where immediate attention and action are crucial due to the risk of harm or death.