When the power is out your electric stove isn’t going to cook any meals for your family. You are going to need an alternative cooking source. It may be as simple as a charcoal grill or a wood fire pit. Propane or natural gas grills are other viable options. Camp stoves also work well especially for small amounts or for one person. Store enough fuel to last several weeks for all your cooking appliances. Have alternate stoves for different applications so you will be ready for any emergency scenario. For sustainability you need to have a stove that uses a renewable fuel source lke wood. Plan around your particular environment.