In an emergency, get the lights on first.
There was this young-adult, coming-of-age novel called The Hatchet that I read when I was a young adult coming of age. It’s about a teenage boy who is the only survivor of a plane crash in the Canadian wilderness. He has a hatchet (a gift from his father) with him, and it proves essential to his survival. One of the most stressful parts of the book involves him accidentally dropping it in water and frantically diving into the dark for it, knowing that his survival is entirely dependent on it.
That part stuck with me. You need your tools.
Light is a tool. A clear brain is a tool. Tools are tools. The end result of a thousand disasters depends on you maintaining those things.
When the lights go out and your house is flooding, get light first. Light helps you fix flooding, but dry feet don’t help you get lights on.