In planning a house, what are some residential features and/or preparations that can be made in the event of a prolonged power outage?

I’ve lived through four prolonged blackouts in my lifetime. Indeed these are rare events, but they do happen. And as we have learned from these winter storms across America, they are particularly miserable and deadly in extreme temperatures.

In a 1994 ice storm, most power was restored in a few days, but some residents in my city were without power for four weeks as crews tried to restore power to all of the city.

If you were planning a house, or just making preparations to wait out the storm / weather / outage— what would you include?