I don't deal with the heat very well on longer rides. Last summer I took a 40 mile ride with the temps in the low 90's and nearly bonked. We've had a very cool late Spring here and I was bothered by a temp of 84 on my ride last Saturday - not used to 80s yet. I know that would be cool for many people here at this time of the year.
Our temps here look like they are going to continue to be cool, which is great by me. After today the forecast for the next several days is 81, 77, 71, 77, and 78. Perfect riding weather.
But my poor daughter in North Carolina is being baked. 94 yesterday, 97 today, 95 tomorrow, with high humidity.
How do you deal with the summer heat? As a 50+ with certain medical conditions, I must admit that I am more careful about this than I used to be.