France’s ageing electrical grid threatens its green steel revolution. President Macron ordered a critical 400kV line to Fos-sur-Mer operational by 2029, accelerating a project that typically requires a decade. The existing 1970s infrastructure cannot power new electric arc furnaces. RTE will reinforce existing lines & build new connections, eliminating a dangerous bottleneck that currently funnels 60% of regional electricity through one valley. This infrastructure stands as the sine qua non for decarbonising France’s southern industrial corridor.