+1.
I had to laugh from my experiences in Scotland last month. When we were in the St Andrews, Crail, St Monance area along the south eastern coast, temps were in the high 50s (F) and there were people playing on the beaches and splashing in the water as if they were in Florida in the middle of the summer. We were in the town of Dunkeld and were talking to a few of the locals. One woman apologized for how flustered and bothered she felt because "the heat was so horrible"... it was 68°F. I mentioned that our summertime temps in Kentucky are usually 33-34°C and can get as high as 37°C, they looked at me in obvious disbelief.

As for commuting in the heat, there's not much you can do other than make sure you drink enough water. I feel better when wearing a good loose fitting light colored shirt with decent wicking properties because it pats heavy moisture from my skin, provides ventilation between shirt and skin yet covers my skin from direct sunlight. I also try to find a happy medium between the amount of effort and how strong of a breeze my speed provides.