Sandstorms arise quickly in the Calim desert, scouring the flesh of those caught inside. A Calim sandstorm is typically at least 300 feet in diameter and lasts 1d6 hours.
The area of a Calim sandstorm is Heavily Obscured, and open flames in the area are extinguished. A creature makes a DC 10 Constitution saving throw after each hour spent in a sandstorm's area. On a failed save, the creature gains 1 Exhaustion level.