I'm not sure which is worse, losing the air on a hot muggy day, or losing the heat when it's below zero. I know you can always add clothing when you're cold, but in the summer once you get down to your skin you can't take anything else off! I have a lot of difficulty breathing when it's hot and humid, so losing my air can be hazardous to my health.
Also in the winter you can put your frozen foods outside to keep them frozen or fresh. In the summer when the fridge won't work the food just sits and rots. This is the third time I've lost power days after filling my freezer. The first time I had a huge upright freezer that I had just filled with $500 of meat that I'd just bought from a butcher shop. That was the time the entire eastern USA lost the powergrid. My freezer died when the power came back on. The last two times it was the frozen food in my fridge that suffered the damage. Not nearly as much of a loss, but still costly and financially unable to be replaced right away.
What did people do before modern conveniences were invented. I'm still trying to figure out how I managed to survive all those years without a cell phone or computer...