system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why is it unsafe to take a shower during a storm?

Is that not just an old wives tale?
gpt
So, in the past with copper pipes,  which are good conductors of electricity,  would cause issues in the correct situation. 

If lighting struck part the water system, saturated ground, or a house that is not grounded electricity can run along pipes and alone the water that a person is using.  This can electrocute them.  

It is not as common now as it was decades ago.  

Plastic piping and proper grounding of the homes help this issue.