cooling city water in the summer
Very common in tropical Australia, not a big deal. The ground gets hot in summer and even though the street pipes are six feet underground the water can scald.  Every summer we turn off the power to the hot water storage tank, it then becomes the cold water supply. If we use too much "cold" water the tank warms up. The house has an  evaporative cooler and the tank is positioned inside the house and is cooled.