“Do you plan or think about droughts / water war scenarios?”
I choose to live somewhere that has ample year-round precipitation. My house has an integral roof fed cistern which I want to enlarge from 500 gallons to 2500 gallons. It’s the source of all water for the house. I drink and cook with it after feeding the water through a Berkey using their white ceramic filters. Most of the rain that hits my roof overflows the cistern but expanding my capacity would extend my ability to handle dry weather stretches that happen from time to time. I am surprised that more people don’t use systems like mine.