I learned this in LV. You can cool yourself by holding something cold over central circulatory places on your body. i.e. the inside of your elbow ("the ditch"),

I learned this in LV. You can cool yourself by holding something cold over central circulatory places on your body. i.e. the inside of your elbow ("the ditch"), back of your knees, or nape of your neck. I would use very a chilled/ice cold stainless steel water bottle. Similarly, in cold you can stay (significantly, in my experience) warmer by holding the bottom of your feet and/or your hands together flattest/largest part to flattest/largest part. Edit-Also, you should have covered every bit of the inside of the window with aluminum foil. Flat up against the pane of the glass. Then have towels/blinds on the other side.