The world of Tempest exists in the same multiverse as other games that use the D&D or pathfinder rules, such as the forgotten realms.
It is a world constantly wracked by massive storms on a scale rarely seen on other worlds. The most deadly of these being the Mana Storm. Because of this, the people that live on this world are a bit different than one might find on other worlds of the multiverse.
Humans and Dwarves share equal prominence on this world. Elves exist, but in very small numbers and are rarely seen. There are no gnomes or halflings. Other races live on this world but in different states than one might expect.