Board Thread:Lore Discussion/@comment-72.27.127.103-20150320015853/@comment-4441359-20150320034727

Probably. At the apparent depths of Dwemer cities (Atherium Forge not included) the temperatures wouldn't be too high to make survival difficult. For humans the main problem would be the damaging psychological and physical effects of living for too long in dark, enclosed spaces. Vitamin D defeciency would be a problem, and it has been shown that spending too long in enclosed spaces has a detremential effect on the human mind (largely shown through extended stays in space stations).

However, the Dwemer most likely wouldn't have those problems; they were most likely adapted to a life spent largely underground. Of course, applying real science to a fantasy world doesn't always work, but in this case I think that it's most likely accurate.