It is always wise to be well prepared for emergencies or calamities. In threatening situations you can take special measures to be prepared for disasters (prepping). Think of calamities such as fire, severe weather, natural disaster, attacks, power failure, epidemic, war, etc. In addition to bringing the basic necessities (water, food, medicine) into your home, you can think of safety products that you can use in an emergency.
So it is handy to always have a flashlight nereby in case the power goes out. Make sure you also have batteries. Or some glow sticks. This way you always have emergency light without need of fire, electricity or batteries. Glow in the dark tape is also a very useful product, for example if you want to make an escape route or emergency exit clearly visible in the dark. Or a battery-powered radio, so you can always follow the latest news.