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The axis (mostly Germans) did bomb Stalingrad. A lot of cities were on fire and the water and electricity grids were out. By the end of the battle, almost the whole city was destroyed, but some buildings were still standing, so the Soviet soldiers probably hid in those buildings. But I'm not sure about that.
Air-raid shelters were not common in the city for its population, so almost everybody needed to stay out in the open.
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