Of two disparate disperate phenomena that surprisingly have the same or at least a related explanation

A drop in a city's electricity supply can cause a drop in water supply.

Explanation:

Water supply and electricity supply in a city are two different phenomena that happen independently of each other. However, problems with water supply in a city can be related to problems in the city's energy supply. This is because the supply of water is done through the operation of hydraulic pumps. These pumps operate on an energy basis, which causes the lack of energy supply to promote a lack of water supply.