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A company in Japan has come up with ventilated baseball caps to battle the extreme heatwave that hit the country this summer.
At least 57 people died from the heat between July 29 and August 4, while more than 18,000 were taken to hospitals suffering heat-related health problems. The tally of those needing treatment is the second-highest since 2008 and the high temperatures have become a concern for Tokyo 2020 Olympics organisers.
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