Currently here in the Netherlands we're having quite warm weather, I work in a greenhouse in which temperature's rise quite fast. I had to work in 40 degrees Celcius (104 Fahrenheit) last weekend. Upcoming weekend this might get up 47 degrees or 117 Fahrenheit, what I was wondering is how long can/may I work and do I damage myself if I work a full 8 hours?
My work consists of helping customers find things, refilling plants, watering plants and moving trees/heaving things (around 20kg/44 lbs) for a full 8 hours.
If it's not too busy at our greenhouse shop I can usually take a 15 minute break around 3:00PM and that's all I get for the day which is enough although I wonder if I should take precautions to make sure my body stays healthy.
So basically I'm interested in how long can a human being work in a store where it is 47 degrees C? I can understand that this is quite a broad question but I'm looking for a general answer and what precautions I can take. Would there be any side effects?