The morning sun beats down on Antonio Reina as he tends to a public garden in Barcelona, but he works reassured that a simple wristband protects him in the summer heat. The device contains a sensor that detects body temperature. If Reina gets dangerously hot at the risk of making a potentially deadly heatstroke likelier, a red light and a sound raise the alarm. “It’s an extra layer of security. As it’s supposed to go off before you have symptoms, it lets you leave wherever your place of work is, drink water, and get under the shade,” Reina, 54, told AFP. A picture taken on July 6, 2026 in Barcelona shows a gardener’s wristband containing a sensor that detects body temperature. — AFP The wristbands exemplify how Spain, a country long familiar with high temperatures, is adapting the world of work as climate change makes extreme heat spells more intense, frequent and longer. The issue has taken on greater urgency in Europe after last month’s exceptional heatwave sent temperature records tumbling, was linked to t...