Response from a guy who is actually there:
“A soldier in 40-50 lbs of armor AND ammo AND long sleeves and pants AND helmet AND gloves AND knee pads AND boots who is carrying a rifle AND carrying 10 lbs of water IS ‘a solid object.’ Furthermore, said soldier DOES operate on ‘heat-conducting surfaces like sand, concrete, or asphalt,’ NOT ‘in a ventilated location’ — oh, and is either standing or moving while doing so, as well.
“The effective temperature to a soldier here is much more like 145-150 degrees during the peak of summer — not 130 or 124.
“Feel free to leave your Ivory Library and actually check it out some time, David Sessions.”