Karo's skies were always a yellowish gray, and every day, endless sandstorms would rage against the city's barrier. Although the residents of the city didn't need to prepare against the wind and sand like they would need to if they were outside the barrier, it was only natural that the city's skies would darken as long as there was a sandstorm outside.
At such a time, Karo City's magical lights would all be lit, but Karo could no longer afford to use such a luxurious, resource-consuming item when supplies were limited, as the Earth Elemental Plane was recently cut off from the Mortal Plane. So, whenever the sandstorms occurred, the entire city would be pitch-dark and everyone would only be able to stay home and sleep.