Coming from India and as someone who has lived, growing up (in the 90s), without power for hours and days...trust me you are going to be deeply inconvenienced but not going to die. We had hand fans (hot climate) and fire in large bowl shaped vessels (when cold). Nights without power are spent sleeping on terrace. We had oil lamps for light in the evening. Most night activity would siege by 8pm max to wake up early at…
We built a fire in the fireplace, cooked over candles (and mostly ate food that didn't need to be cooked) and melted snow for more water. Lounged around in a big pile of blankets playing with our cats, reading books, and talking instead of using TV, computers, and cellphones. It was chilly, and there was a bit of media withdrawal, but it wasn't really all that bad.
But for sick or disabled people who need electricity for their oxygen machines or to run their electric wheelchairs or other things, it could be bad. And without a fireplace (which many people don't have, and we don't have now), it would likely have gotten too cold.