> This is about temperature in the workplace, not outside temperatures
According to the article, the 30C threshold is for "more demanding jobs in sectors like agriculture and construction", which generally take place outdoors
Plenty of construction work takes place indoors as well. That said, the linked article isn't very clear on that aspect. It also mentions a minimum temperature of 16C in the UK which outdoors would be quite a lovely day, but rather cold for an office or other indoor workspace.
Plenty of construction work takes place indoors as well. That said, the linked article isn't very clear on that aspect. It also mentions a minimum temperature of 16C in the UK which outdoors would be quite a lovely day, but rather cold for an office or other indoor workspace.