Why Do We Say 'It's Raining Cats and Dogs'?

It’s raining cats and dogs means it’s raining really hard. Long ago, people thought the heavy rain looked like animals falling from the sky, maybe because of big drops or things floating in the water. It sounds silly, but it's a fun way to describe a storm!

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Examples

A big storm hit the town, so people said it was raining cats and dogs.
My sister laughed when I told her she was like a cat in the rain.
The puddles looked like they had little animals swimming in them.

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Categories: Science · idioms,weather,language evolution