(Clarifies the worker died after her shift, not during, in paragraph 6, corrects gender of speaker in paragraph 9)By Horaci GarciaBARCELONA, July 2 (Reuters) – With Spain already sweltering under successive heatwaves that caused more than 1,000 excess deaths in June, Barcelona has begun to hand out heat-monitoring bracelets to its outdoor workers to act as an early warning system for health risks.AdvertisementAdvertisementThe city has rolled out around 1,400 bracelets for staff working outdoors, including street cleaners, lighting crews, park workers and waste management employees.It is part of a push to adapt to “increasingly aggressive” climate change, said Pep Llimona, prevention coordinator of the city’s parks and gardens service.The bracelet measures the workers’ body temperature and emits a sound and vibration if it senses that the wearer is at risk. If that happens, they have to stop working.A number of street workers have died in recent years across Spain as temperatures spiked, prompting changes in working patterns and conditions.AdvertisementAdvertisementIn Barcelona, a 51-year-old woman died in June last year after sweeping streets in the city’s old town as temperatures hit 30.4 degrees Celsius (86.7 degrees Fahrenheit).Barcelona City Council said at the time it would launch an investigation into the death. A spokesperson for the city said on Thursday there had been no indication that the cause was heatstroke.Pep Llimona said the plan to introduce heat bracelets had already been in train before the woman’s death.”But it is true that it has helped to speed up things and has made us think a little more,” he sa …