Wild Yet Genius: Japan’s Most Unusual Inventions

10. Rain Alert

What it is: Elevator lights that warn of incoming rain Invented: 2019 Average Cost: Not specified

In Osaka high-rises, indicator bulbs glow red when showers approach, reminding riders to grab umbrellas.

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Awesome Inventions/TTwitter.com ©Rain Indicator

A small tweak that saves countless soaked commutes.