Speculation:Enclouding

From the Lyorn Records of the Dragaeran Empire

The Enclouding that blocks out the sky in the Dragaeran Empire could be a side effect of Greater Sea of Chaos, and more recently the Lesser Sea of Chaos.

If the Overcast can be attributed to Elder Sorcery, as above, this might explain why it still existed during the Interregnum. Alternatively, if it is in fact merely some sort of pollution from ordinary sorcery (as noted below), perhaps it was prevented from dispersing by the Gods so as to hide from the Jenoine that ordinary sorcery was no longer working.

It is thought to be an adverse effect of the use of sorcery, a form of magical pollution, which helps explain why the effect does not appear in the East, and the fact that the Enclouding is less prominent in certain areas of less habitation, especially near the sea. This theory is bolstered by information contained in the introduction (written by Brust) of the non-canon Dzurlord novel.