Depends on how the Line is powered. A single long-distance line to a distant nuclear facility powering the whole thing? Or dozens of independent solar farms in

Depends on how the Line is powered. A single long-distance line to a distant nuclear facility powering the whole thing? Or dozens of independent solar farms in the surrounding desert, each powering a nearly section of the Line, with both local storage and backup power from afar? A proper fault-tolerant design will buy enough time for most residents to walk to a neighboring section that still has power.