First off, congrats on completing your treatment!
One thing I’ve noticed when meeting friends, who reside in the south, at the parks in the summer is they all seemed to be less acclimated to the heat/humidity than my (still struggling, mind you lol) family, from PA.
Dawned on me that many FL residents are accustomed to having central AC at home (not as prevalent here with many having hot water/boiler heating systems) & wisely do their best to not venture out in the heat of day if they can avoid it.