I was once without electricity, running water, etc for several days after a major storm.
I should have evacuated way out of the area like just about everybody else around me did - but I had been through these things before, and had always found these warnings to be way overblown. I convinced myself that it wouldn't be anything to worry about yet again, but I ended up being wrong this time.
I bathed in my pool for a couple of days while I was still home, but it wasn't the same as a nice shower / bath. I spent most of my time drinking and wading in the pool, but I constantly felt dirty. It was miserably hot and humid when not in the pool without AC and fans.
After a couple of days of this, I packed up and left the area for a couple of weeks and stayed in a hotel until power was restored and life got somewhat back to normal. I was unable to get ahold of my landscapers during all this time, and my grass was quite high by the time I got home.