As the surface temperature approached 60°C, three heavy-load power lines required urgent inspection. The inspection team used drones to deliver spare batteries, high-definition inspection equipment, and other supplies to remote inspection points, avoiding long-distance travel for personnel under extreme heat. This allowed the line inspections to be completed simultaneously, identifying five layout defects, achieving both supply delivery and inspection efficiency six times higher than manual work, ensuring summer electricity safety for 23,000 households.