TX is really only hot in.... mid-late summer. Even then, everyone just uses A/C and alters their patterns for that time. Just like up north, where it can be quite cold in the mid-winter, and people alter their patterns for 60 days.
https://www.extremeweatherwatch.com/cities/austin/yearly-day...
I personally just drank a lot of water for lunch rides (I'd take a gallon for a ride) and electrolytes. Favorite time to ride, trails were empty.
You are basically agreeing that you are stuck indoors for many months of the year, during day time.
Also, this last year, which was many people's introduction to the heat, it was much worse than just a couple months.
https://www.kxan.com/weather/weather-blog/austin-records-hot...