Not yet! Curretn european legislation is being looked at to bring in a maximum temperature (I think of 30oC) which may become effective in the next year or so.
Your health and safety folk should have given out advice for working in "difficult conditions" ours hacve said to ventilate buildings as freely as possible, ensure that there is access to cold water for all staff, to consider allowing a relaxation in uniform rules where appropriate and safe, and where working conditions are particularly trying, to allow fresh air breaks as often as possible. Hope this helps.
28degrees in Tokyo...reason being that last year some of the nuclear power plants had to be shut down coz of faults and so there is not enough to fuel Tokyo. So now there are lots of posters around with 28 on them. TV commercials of a business man coming back to his office in a lather of sweat...runs to the air conditioner control sees it is set at 28 ...is just about to turn it down looks around the office and all the secretaries have wollen cardigans and some are drinking hot soup .....peer pressure wins in the end and he sweats back to his desk and bears the unbearable like a good samurai. Personally I find 23 nice.
Thanks for your comments! It reached 35oC in our office on the day I asked the question, and I was just wondering whether we could take any action. It seems not!