In English, the idiom "when it rains, it pours" is used to say that when one bad thing happens, other bad things often accompany it.
The team not only lost the game but three of its best players were injured. When it rains, it pours.
Is there an equivalent idiom in Italian?
I found one source suggesting this might be equivalent:
Piove sul bagnato. (tr: "It rains on wet ground.")