Suppose a person saves the life of others without giving any thought that it could be dangerous, harmful, or life-threatening to himself. He doesn't care that this endeavour might harm, injure, or even kill him.
For example, if someone is trapped in a fire and another person saves, or tries to save the trapped person. Now to report this incident, I could frame a headline like this:
A ___ person without caring his life, saved the lives of 3 people entrapped in fire.
"A brave person" is an obvious choice but I want to emphasize that he did so without even caring for his life.
What word(s), phrase, or idiom makes this clear?