coming down in sheets

Origin

Imagine standing outside during a true deluge, the kind where the sky opens up and unleashes not individual drops, but an impenetrable wall of water. That's the vivid picture this phrase paints, transforming the chaotic cascade of a severe storm into something tangible and structured: 'sheets.' The term taps into the very human need to make sense of overwhelming natural phenomena by comparing them to familiar, man-made objects. While there's no single historical moment or figure to credit, this idiom likely solidified in common English usage simply because it's such an effective, visceral description of torrential rain, creating a perfect mental image of water falling in continuous, unbroken curtains from the sky. It's a testament to the power of simple, evocative metaphor in language.