U.S. power grid stress is now a year-round concern, FERC orders tariff reform for large loads

The U.S. Federal Energy Regulatory Commission issued directives on October 19, 2026, to six regional grid operators, ordering them to justify and reform the tariff rules that govern how large electricity consumers — primarily data centers — connect to the grid. The move came one day after Bloomberg reported that American power grids are issuing supply alerts in fall and spring, seasons that historically carried lower demand, because AI-driven data center load is now constant rather than seasonal.

The numbers behind the concern are significant. The North American Electric Reliability Corporation's January 2026 Long-Term Reliability Assessment forecasts summer peak demand growth of 224 gigawatts over the next decade, a 24% increase from prior projections, with winter peak growth projected at 246 gigawatts. PJM Interconnection, the regional operator covering a large portion of the eastern United States, is anticipating an additional 30 gigawatts of demand from data centers alone by 2030. The mid-October emergency order that directed backup generation resources to operate across the PJM region — already covered in this briefing — was a direct result of those tightening conditions occurring in autumn rather than peak summer.

For facilities managers and operations leaders, the practical implication is that grid stress events are no longer predictable by season. Organizations that have backup power — generators, battery UPS systems, or both — may want to confirm that equipment is tested, fueled, and ready for any month of the year, not just summer peak periods. Businesses in PJM territory (which covers all or parts of 13 states plus Washington, D.C.) should also be aware that FERC's tariff review could eventually change how large-load facilities are classified and charged on the grid.