First off everyone made it out ok. Not sure on all the details, but it appeared to be a trailer on fire on our west wall. I was sorting and around 1:15 am the belts stopped and the alarm started going. I was in the southwest corner of the hub, and our muster area is in the southwest corner of the lot. As we headed out we could see into the hub through the airdock doors. There were flames going up pretty high. We didn't stick around for long since the wind was out of the north @ 30mph. The worst part is I had worked twilight, so I was just wearing shorts and a tank top. A cold front came through and the temp dropped 40 degrees. I had no time to grab my hoodie. I froze my arse off outside. Fortunately there were a few package cars waiting to be washed, so those without jackets could get out of the wind. We finally got to leave around 3:30.