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The risks of heatstroke at one of the hottest Games on record are borne not only by the athletes, but also by the thousands of staff, especially at outdoor venues.
In addition to conventional measures like water spray and mist fans, organisers are going high-tech, deploying a cloud-based system from Chinese e-commerce giant Alibaba Group to monitor workers' real-time conditions and send warnings and advice at signs of danger.
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To forestall heatstroke, staff at 14 venues are using a black earpiece that sends heart rate and body temperature measurements to the cloud, where heatstroke risks are evaluated by an algorithm combining individual data and environmental factors.
The system sends alerts to those at high risk of heatstroke through an app, with recommended precautions such as taking a rest and drinking more water.
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