Forum:Does Illium have more named cities that just Nos Astra?

I vaguely remember reading, either in-game or perhaps even somewhere on the wiki, about a second city on Illium. Everybody knows about Nos Astra, but I recall an off-handed reference somewhere, and I just can't find it again. What I remember is something about Illium being too hot, and that city had to be abandoned and that is why everything we see of Illium in ME2 is at such high altitudes because the Asari learned the immense heat proved to be too inhabitable. Has anyone else heard of this information? If so, where could it be found and would it be a good contribution maybe to mention in the trivia section of the Illium page?