South Korea deploys drones with speakers to warn farmers of heatwaves

South Korea's authorities have deployed drones with loudspeakers and thermal imaging cameras to warn farmers about heatwaves twice a day to reduce heat-related illnesses. They warn farmers to avoid working outside for long hours as temperatures climbed to 41.2 degrees Celsius. The drones broadcast warnings like, "Don't work for long hours" and "There is a heatwave alert, so be careful."