Your employer has a responsibility to keep you and your coworkers safe. This article by Working America emphasizes how temperature can impact worker productivity, what you should do if you are experiencing extreme temperature in your workplace. The article emphasizes a few points. They suggest that you familiarize yourself with the symptoms associated with heat and cold stress and consider joining with your coworkers to bring these concerns to your boss. However, if your boss is not acknowledging the issue, you might consider filing an OSHA complaint.