In the old fashioned way.
Remember how they lived before, around the middle of the last century. Buckets, saucepan on the stove, all this is Soviet reality. The heating speed is high, while the electricity is spent enough. They dragged the water to boiling, brought it to the bathroom, mix with cold, take a bucket and you can start water procedures. Used to wash, so you can survive days with a bucket, if you do not want any costs.