Watch out for other sources of heat
Do you know those videos where people cook eggs on the tile in Arizona? Imagine the amount of heat that allows people to cook food without needing a stove.
Because you don’t need to add up other heating factors to the extreme temperature that’s already outside, you might as well avoid cooking food that implies using the stove or the oven. Also, incandescent light bulbs and computers left running are factors that can heat up the air in your house, so you’d better stay away and avoid as much as possible using them.