One summer in the early to mid 1980s I worked alone in a photographic darkroom
printing from antique glass, and old large format film, negatives
for a museum photographic exhibition.
it was consistently over 80F and stifling,
with no air conditioning or air flow at all...

It was a real effort trying to keep sweat rolling off my face onto the photo printing paper
as I was exposing it under the enlarger...
...and not an ideal temperature for wearing heavy duty rubber gloves
whilst working with the chemicals...

I remember suffering very unsightly uncomfortable heat rash and dermatitis that summer...