Three years ago heading from Andorra to Barcelona on the Friday before the G.P. we thought we'd be safe arriving in Barcelona around 7.00 p.m. as our hotel was on Las Ramblas and the traffic should have subsided a bit by then.
We got a bit lost on the way in and the traffic was appalling - I think Spanish rush hour must be around 7.00 p.m. on a Friday! The temperature signs outside the pharmacies were telling us it was 35 to 38 degrees. The temperature guage on the ST was showing over 120. I had to stop at the side of the road to puke as the heat was really getting to me.
When we reached the hotel I found that mt inner thighs had cooked nicely in their own sweat and resembled a boiled ham. Two weeks later all the skin peeled off.
It doesn't have to be cold and wet to be bad