Well, they've really been cutting down on us lately, and making things ALOT harder. I haven't told them I'm pregnant yet, because I'm still a temp. Basically I pick car parts, and put them in totes. Some stuff can get heavy though. I'm not sure I will even be there much longer, since I, along with many others, aren't making production anymore.
Just be careful. When it gets hot in the summer, drink lots of water
I don't see why not. I used to work in a warehouse and it's definitely something I could have done while pregnant. Especially since as you say it does pay more than lots of other options!