I find that just a headband makes things SO much easier, don't have to wipe off sweat after each section. Have to wring it out a few times, but it was like night and day when I wore one vs not.
I don't mind heat... it is when it is combined with ridiculous humidity that makes it tough. When all I have done is grabbed my two buckets and I am already soaking... its not a good day haha.
I find myself tiring out much quicker though in heat.. 6 hours into a day of polishing and I am done. Compare that with 85º temp with 30 % humid and I could go on all day.