I used to work in a factory for a month. I couldn't handle it after that. Doing the same thing every day over and over again bored the SHIT out of me. I need a job that stimulates my mind. But, yeah, I feel ya on the heat thing. I worked in this veneer factory in the middle of the summer, and the specific job I did there required me to wear a long sleeve shirt. I operated this huge pressing machine, that heated up the thin slices of wood and pressed 'em flat. The metal easily got up to 300+ degrees, and I'd have to occasionally get out pieces of wood that got stuck, which is why I had to wear a long sleeve shirt.

Shit, one day I was reaching in there to get a sheet out and my sleeve rode up my arm and it burnt the SHIT out of my wrist. I had to go to the emergency room and everything. But yeah factories suck balls. Good luck!