What is the first thing an EMT should do when arriving on scene?

The first action an EMT should take upon arriving at the scene is to assess the scene for safety. This initial assessment is critical for ensuring both the EMT's safety and that of the patient, bystanders, and any other personnel present. The EMT must look for potential hazards such as traffic, fire, unstable structures, or any other environmental dangers that could pose a risk.

This step is foundational in emergency response, as an unsafe scene can compromise the wellbeing of both the patient and the responders. Once safety is confirmed, the EMT can proceed with patient assessment and care. Addressing the safety of the scene first helps in planning further actions without endangering those involved.

While other options are important aspects of patient care, they should only be initiated after a safe environment has been established. Immediate patient care, calling for backup, or checking vital signs are contingent upon ensuring the scene is safe; otherwise, it could lead to additional injuries or complications.