bagheera: you think it bad for chorus guys - they have it easy compared to a road worker on a State Highway - even in northland with 30+c temp this summer they have to have safe boots, safe eyeware, high vis clothing, long sleeves shirts & long pants, safety helmets, gloves - then they have to have lots of breaks as they are over heating.......
http://www.nzta.govt.nz/resources/health-and-safety-ppe/docs/health-and-safety-ppe.pdf
and on that note the armed forces in the middle east and other very hot climates that have to wear body armour, helmets boots and also carry all their gear, they don't get regulation time off to rest when patrolling.
I've always admired the fire service and all the kit they wear into a fire in any temperature.