system
Given the following post, respond as if you're commenting on Reddit:
human
[Dresden Files] What happened between the Seelie and Unseelie courts to cause the recent cold snap in Chicago?

We've seen how the weather can be affected by how the different courts interact. We've had both heat waves and cold snaps caused by various trouble within or between the courts. What is it this time? Does Dresden know about it, and is he working on it? Previously we've seen a lot of snow, but not this level of cold and freezing. Someone, please give me some insight.
gpt
I would guess that there are outsiders operating in the city. Mab has come to deal with them bringing a significant portion of Winter with her.

I suggest staying out of the weird places. If there is this much of Winter in Chicago there is something there that warrants their presence...