The Gemara asks: And Rabbi Yoḥanan, what does he do with this verse: “And your brother shall live with you”? The Gemara answers: He requires the verse for that which is taught in a baraita: If two people were walking on a desolate path and there was a jug [kiton] of water in the possession of one of them, and the situation was such that if both drink from the jug, both will die, as there is not enough water, but if only one of them drinks, he will reach a settled area, there is a dispute as to the halakha. Ben Petora taught: It is preferable that both of them drink and die, and let neither one of them see the death of the other. This was the accepted opinion until Rabbi Akiva came and taught that the verse states: “And your brother shall live with you,” indicating that your life takes precedence over the life of the other.
(א) על מי מחללין שבת. ובו ט סעיפים:
כל פיקוח נפש דוחה שבת והזריז הרי זה משובח אפילו נפלה דליקה בחצר אחרת וירא שתעבור לחצר זו ויבא לידי סכנה מכבין כדי שלא תעבור:
(1) 1. All cases of saving a life supersede Shabbat, and he who hurries in these matters is praised. Even if there is a fire in a different yard and there is concern that it will move to this yard and cause danger, we put it out to ensure that it does not spread.
Rabbi Harold Kushner, When Bad Things Happen to Good People
The flood that devastates a town is not an ‘act of God,’ even if the insurance companies find it useful to call it that. But the efforts people make to save lives, risking their own lives for a person who might be a total stranger to them, and the determination to rebuild their community after the flood waters have receded, do qualify as acts of God.