The water cycle is a natural complex process through which water flows between the atmosphere, the surface of Earth and other systems of the Earth. In this cycle, the heat emitted by the Sun plays an essential role because due to this, water on the surface evaporates and goes to the atmosphere where it forms clouds that later condensate, which makes water go back to the surface of Earth. This implies without heat from the Sun water would not evaporate and as a result, the water cycle would stop or would not work.
It is likely that the citizens have very limited water for agriculture and personal uses and it is stored in their homes, while in the U.S we have water ready at the moment we need it and can access it with faucets.