What is a critical first step when responding to an electrocution incident?

Turning off the power source is indeed a critical first step when responding to an electrocution incident. This action minimizes the immediate danger not only to the victim but also to the rescuer. Until the power source is turned off, there remains a risk of electric shock, which can lead to further injuries or fatal outcomes for anyone attempting to help the victim. This includes the potential for secondary injuries if the rescuer comes into contact with the live source while trying to assist.

Once the power source is disabled, it is safer to approach the victim and assess their condition or administer first aid, including checking vital signs and calling for emergency assistance. Taking control of the situation by eliminating electrical hazards is paramount to ensure the safety of all involved before initiating further rescue measures.