Good info Lee, hope all is well.
Congrats on your recent Instructor Certification from Dave Spaulding.
I've given many classes in the summer months and (knocking on wood) we have had no heat related issues. I keep a very close eye on everyone regardless of age and physical characteristics in an effort to stay ahead of problems.
Consistent breaks during training, hydration, and leaving the ego at home are important to successfully training during peak summer days.
A good reminder now we are headed into the hotter months...