There are clothes designed to keep you from cooking in your own juices. Search for 'cooling vests'. The prices range from $40 to over $300 depending on the type.
First (and cheapest) is the evaporative type that you soak in water for a few minutes and then wear. They will keep you cool for 4 to 8 hours but because they are wet you are damp too, a much better option than just being hot and sweaty though. Disadvantage is that they are wet and dusty air, like standing at a lathe, is no fun. Plus you cant wear them under your clothing. You can also get scarves and hats that work the same way.
The second and third (more expensive) use ice packs or phase change materials that you chill in a freezer or ice chest. The packs are put in pockets and pouches in the vests. They are dry and can be worn inside your clothes and last from 2 to 4 hours before you need to swap them out for another set of packs.
I have use the first type while at work when it was +30C and it let me do my 10 hour shift in comfort while everyone around me was wilting and griping in the heat. I also setup a big fan near me to keep the air moving over me and increase the cooling.
Pffftt! No more of a problem than the humidity already here... I wouldn't mind dry heat so much, but this humidity and heat in Georgia is like to kill me....