Geological / environmental event
It is currently The Year of the Raging Baatezu, 1595 RD. It is the month of Eleasis, or "High Sun" which some refer to. It is the 3rd day of the first tenday of Eleasis
Due to scorching heat for months, and hardly any rainfall. Crops wither and die. Wells dry up and people and creatures are starting to starve as a result of this. The heat is immense and for the moment it feels like there is no end to the summer.