For me it has been the heat.
I had to change my sleeping time due to the nights it gets hotter in my house.

It is 88 degrees and feels like 100 where my friend is in Puerto Rico.
It is 100 degrees where my house is and feels like 108 degrees.

It hurts my kidneys bad, the heat runs my blood pressure up.
It messes up my electrolytes.
I have to sleep in a different position and time and avoid sitting for to long of periods.

Drink as much water as I can.
This has been a heat done over us for over 30 days now.
My feet are blistered and weeping from it, due to the fluid retention.

It is the heat, I usually can not take anything over 60-61 degrees temp with out getting sick from it.