What is an example of man versus nature in Night by Elie Wiesel?

There are numerous examples of the external conflict of man versus nature in Elie Wiesel's Night.

The night seemed endless.

The nature of this quote is twofold (when examining it based on its identification as an external conflict). First, the idea of night being endless acts as a conflict between man and nature. Man struggles against the idea that the night will never end. The fear and hardship that the night brings with it functions as an antagonist. Secondly, this quote also speaks to the symbolic nature of night. What the Jews are about to go through feels like it will go on forever.

The snow continued to fall heavily.

Here, the snow is the antagonist. The prisoners are forced to march through the cold and snow. The snow, and its coldness, cause many to die and suffer from frostbite. The fact that many of those traveling in the snow from one camp to another fail to make it illustrates the conflict between man and nature.

At the end of chapter 5, the Jewish prisoners are forced to evacuate the Buna camp because the Russian Army is quickly advancing toward their position. After the Jewish prisoners clean their block, they form organized lines and begin marching out of the camp in the middle of the night while SS officers order them to increase their pace. The man versus nature conflict in this scenario is the harsh winter winds and heavy snowfall, which pose an extraordinary challenge to the unhealthy Jewish prisoners. The Jewish prisoners suffer from the frozen terrain as they march like automatons in the thick snow. The prisoners are barely clothed, and the freezing conditions take a toll on their emaciated bodies. Elie recalls how his feet go numb during the arduous trek and mentions that the snow feels soft enough to sleep on. When the prisoners finally arrive at a destroyed brick factory, Elie lays down in the snow, and his father warns him not to fall asleep. Elie and his father struggle to stay awake as they walk over the corpses of people who died of hypothermia. Overall, the harsh winter environment presents a difficult challenge to the emaciated Jewish prisoners.