When you fire up the stove or oven in the summer for meals, indoor temperatures soar.
My DW & I limit stove and oven use to the early morning or in the evening, then open the slider and have a large fan blowing out the back door.
It used to take all night for the house to cool back down, with this trick we've reduced that to about an hour. The A/C stays on a lot shorter time and we save on our energy budget.
The biggest energy saver is when I cook on the grill - the heat all stays outside.
Like folks back in colonial times, I can fix bread, pizza, and casseroles. Anything that can be cooked on the stove can be cooked on a grill.