>The union said employers should take steps to cool down workplaces once temperatures exceed 24C, with workers able to stop working if temperatures reach 30C, or 27C for those doing manual labour or working outdoors.

Geneva already has a version of this. You have to stop outside work at 13h00 unless it's necessary, in which case you have to take 45min breaks for every 15 minutes of work. However the threshold isn't 27C but rather like 32C (from what I understand)