The state in which I reside has hot summers often exceeding 100 degrees for several days at a time. May people are heavily dependent on their air conditioners. I have to admit I enjoy mine. One thing I have noticed lately is that because people use their air conditioners they do not maintain their window screens. I have noticed that a lot of them are missing or damaged.
If the power fails and you have to leave your windows open, window screens become very important. Control of flies, mosquitoes and other flying insects can prevent many health hazards.
When I was a child, we lived in Southern Africa and there were no window screens. Flies were thick and a constant problem. I can remember my mother going to the butcher shop and the meat would be hanging up covered in flies. The butcher would shoo the flies away and cut your choice of meat. My mother would then take it home, wash it and cook it before the maggots would hatch. We survived this and are still all healthy.
However today’s generation has not had the exposure to disease and lack of sanitation that mine had. They may not have the immunities that we had. Simple things like maintaining your window screens and having the materials to repair them might make the difference between members of your family living or dying in a long-term emergency.