South Korean authorities are deploying drones to issue heat warnings to farmers while residents are taking shelter in airports, as the country battles an unprecedented heatwave.

Temperatures have neared or exceeded 40 degrees Celsius across South Korea, prompting local governments to send drones over farmland and refrigerated trucks thr

South Korean authorities are deploying drones to issue heat warnings to farmers while residents are taking shelter in airports, as the country battles an unprecedented heatwave.