I stay out of the high heat times of day-heat & humidity. I'm retired & not required to "get out there" to earn a living. I go out early morning & late afternoon/evening. Also, I have a "piddle place" with A/C where a fair amount of time is spent here in South Louisiana. It helps get us apart for "me time".

I agree with Jennifer “stay moving, hydration, eating healthy, and naps.
I try to stay away from processed food as well.

Sadly none of the options are great. If I have to remain outside in the heat, then I sip on electrolytes or pickle juice while drinking lots of water. I avoid going between the heat and the AC. AC intensifies fatigue. Stay moving! If I can refrain from having to be outside, I stay inside and try and take a 40 minute nap during the time of day that I usually have the worst fatigue. That tends to help alleviate some of it. I have also found that chewing on a half a piece of neuro energy and focus gum helps tremendously!

I have Type 1 and my sleep attacks are worse with the heat. Try cooling your hands and feet. Sometimes that helps too

Thanks for the tips on bread and processed foods. K have been in restaurants and collapsed at the table. It makes me wonder what was in the food i was eating that had that affect.