Remember that this will only be a drill and a drill is not the real thing. The psychological reactions to the drill may be significantly different than the reactions to the real thing. For example, when our power failed because of the ice storm, our resident teenager was ready and willing to chop wood or do whatever was necessary to keep us warm and alive. Your relatives and friends probably will not come to participate in your drill, but they will come when they need to. You may want to use your drill time to plan strategies for maintaining healthy relationships.
Summer is significantly different from winter.
The days are much longer and there is no need to provide heat. Use your own discretion on whether or not to use your air conditioner. While hot weather is in no way comparable to cold weather, if you do not have a good plan for winter warmth, the discomfort of being too hot may mimic the discomfort of being too cold, at least in the human grumpiness category. Good luck in your Y2K test. If you wish to print or reproduce the information on this website for other than your own personal use, you must have specific permission.