A rescuer is someone who helps people in danger or distress, often putting their own safety at risk to save others. This term can refer to individuals such as firefighters, police officers, and paramedics who are trained professionals that respond to emergencies. It also applies to ordinary citizens who step up to help during a crisis situation, such as a person who jumps into an icy river to rescue someone who has fallen in or a bystander who intervenes to stop an act of violence. In summary, a rescuer is anyone who selflessly risks their own well-being for the sake of others.