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 4am ish.
For water we have wells and ponds. Flushing...well what's that! Indian toilets were made to not need lot of water flushing or people simply used nature toilet!
No fridge (fresh food ftw), no vacuum (brooms and mop only), no elevators, no mixer grinder! But we lived. People adapt
Society would collapse and go back in time...however people are more resilient.