Since most of the jobs are oil-related, they involve long hours of hard labor in a dirty environment. There's also a housing shortage, so you’ll probably have to share a room with a bunch of guys. Also, company towns have horrible gender ratios, so it’s not a great a place to be if you’re a woman[1]. All that plus −30 degrees weather[2].

1 - http://www.nytimes.com/2013/01/16/us/16women.html?_r=0

2 - http://www.foxnews.com/weather/2013/12/05/new-cold-snap-prom...