This far south mountain range got its name from the heat that it generates. The range is full of dormant and active volcanoes and is also a hub for the Plane of Fire. Cultist of the god Kossuth built a temple to the fire god here centuries ago and now the range is filled with portals to the Plane of Fire and creatures of fire. The main race besides the cultist and the temple are fire giants. The heat in the air is very hot and can cause exhaustion and the sometimes the smoke in the air can be thick causing sight issues. The Green River runs through the range and is warm and sometimes hot in temperature but never boiling.
Some common places within the mountains are the Temple of Flame, the Osterhaus Inn and the great Fire Lord Cavern in which some adventures trapped the a great warrior here.