In an emergency call 911
In an emergency, call 911 or your local emergency number immediately from any wired or wireless phone.
An emergency is any situation that requires immediate assistance from the police, fire department or ambulance. For example like in A fire, crime, especially In a car crash also if someone is injured, such as someone who is unconscious, gasping for air or not breathing, experiencing an allergic reaction, having chest pain, having uncontrollable bleeding.
Police, doctors, and firefighter
A firefighter is a rescuer extensively trained in firefighting, and to rescue people from dangerous situations, like collapsed or burning buildings or crashed vehicles.
A police officer is a Law enforcement, public safety, civil service, public service, rescue, security