I've recently come across a workplace issue that I'd like to run by you guys (this issue is U.S. centric, but please feel free to chime in regardless). The store where I work (stocking shelves) is fucking blazing hot. The temperature get's so high that my shirt is soaked when I make it home and I'm constantly feeling weak and dizzy while I'm in there and everyone that comes in makes a remark about how hot it is. There's no point in organizing, given that there are only 3 'employees' without hiring power (one of them a Ron Paul fan and the other sucks up to management), but, according to Labor Law for the Rank and Filer, I should be protected by Section 502 of the National Labor Relations Act for quitting labor because of "abnormally dangerous conditions". Also, according to the same book, the act was upheld in a case in which workers walked off the job because the workplace was "too cold to work in" (NLRB v. Washington Aluminum Co.). My question is, should I file a formal grievance before taking any sort action?
EDIT:
When I wrote "3 'employees' " I was counting myself.
I work in the UK in a different type of workplace to you, but we had this same problem. In summer the office got unbearably hot. In the end some colleagues and I monitored temperature in the office every day for three years and produced a chart showing how often it was above our employer's ideal working temperature. And we kept hassling them - whenever the temperature went above the ideal maximum, we asked management to do something or let people work elsewhere. Until eventually they installed air conditioning.
Now, in the UK we have a legal minimum working temperature (16°C) but not a legal maximum. But our employer did have a maximum in their procedures. So I would recommend having a look at your company procedures and the law.
However, I wouldn't jump straight in with a formal grievance, first I would raise it informally with your colleagues and your manager and see what kind of response you get. You could ask about it in a roundabout, casual way, like ask if there was a fan or something anywhere. Then depending on what response you get, take it from there…