It was too cold. Too cold to breathe, too cold to start this damn fire. The underground caverns, heated by the earth's molten core, were irrigated by a vast tracework of warm, even steamy, subterranean springs; but on the surface, anyone who had survived the months leading to this Ice Age was woefully dependent on cramped rooms, too many layers of clothing, and most importantly, the constant presence of fire. Otherwise, there was no water. Only ice.
Suddenly, the fire caught. She lifted the nearby block of ice--as it hemorrhaged, she opened her mouth and drank its warm blood.