The idiom "when it rains, it pours" means that when something bad happens, it often seems like more bad things happen at the same time. It's like a sudden downpour of rain that keeps getting heavier and heavier.
For example, if someone loses their job, they might also have unexpected bills to pay, their car might break down, and they might get sick all at the same time. This is what the idiom means - a series of unfortunate events happening all at once.
We use this idiom to describe situations where everything seems to be going wrong at the same time. It can also be used to describe a situation where a lot of good things happen at once, but it's more commonly used to describe negative situations.
So, if someone says "when it rains, it pours," they are saying that they are experiencing a lot of bad luck or problems all at once.
• Last week, I lost my job and then my car broke down. When it rains, it pours.
• After a year of unsuccessful auditions, I landed three roles in different movies within a week. When it rains, it pours.
• When it rains, it pours outside and I forgot my umbrella at home. (literal meaning)
• The politician was already dealing with one scandal when another one surfaced. When it rains, it pours in the world of politics.
• The company was struggling to meet its targets when suddenly they received a massive order from a new client. When it rains, it pours.
• After months of no communication, suddenly all of my old friends contacted me in the same week. When it rains, it pours.