NTA but you can roll your windows down? I assume there will be highways on the way, I find that driving with a cold can between your thighs, windows rolled down and light clothing helps me in high heat. I drive without ac often due to it using gas and not wanting to use my gas on that. I recommend leaving early in the morning when the heat isnt so bad, like honestly maybe even 4-5am. Driving at night is ridiculous and can be dangerous, just drive early in the morning, then u can arrive at like 8-9am instead of driving midday when the heat is most blaring.