Emergencies
"It is important to differentiate between the rules of conduct in an emergency situation and the rules of conduct in the normal conditions of human existence. This does not mean a double standard of morality: the standard and the basic principles remain the same, but their application to either case requires precise definitions.
An emergency is an unchosen, unexpected event, limited in time, that creates conditions under which human survival is impossible. In an emergency situation, men's primary goal is to combat the disaster, escape the danger and restore normal conditions.
By "normal" conditions I mean metaphysically normal, normal in the nature of things, and appropriate to human existence. Men can live on land, but not in water or in a raging fire. Since men are not omnipotent, it is metaphysically possible for unforeseeable disasters to strike them, in which case their only task is to return to those conditions under which their lives can continue. By its nature, an emergency situation is temporary; if it were to last men would perish. . . ."
~ Ayn Rand Lexicon - Emergencies