Fan really loud after coming in from the cold
I came home from school today and left my backpack in my car which had my MBA in it to talk to my neighbour for a bit. It's approximately -22 Celsius where I live right now. When I came inside, I woke up it up, as it was previously sleeping, and it's fan (or at least that's what I think it is) was really loud. Ever since I got it, I haven't heard the fan once, and I was horrified when I heard it, so I quickly turned it off. I later found out that I have to let it warm up to room temperature before turning it on. It's been about 2 hours now and I just tried to turn it on again, and I'm still hearing the fan. What should I do? I'm worried because I don't want to harm my MBA, but I also need to use it to work.
MacBook Air, OS X Mavericks (10.9)