Electricity demand is rising at its fastest pace in decades across key developed markets, and grids are not keeping up. The International Energy Agency frames the shift as the "Age of Electricity" in its 2026 Electricity report, a designation that signals how far consumption growth has moved beyond the stagnation that defined developed power markets for years.

Three forces drive the surge: data centers, broad electrification of transport and heating, and renewed industrialization. Each is reshaping long-term assumptions and forecasts about power markets in every region, according to the IEA.

The consequences land hardest on grid operators. After years of flat load, transmission and distribution systems planned for modest growth now face demand curves climbing at rates not seen since the mid-20th century buildout era. Permitting queues, transformer lead times, and interconnection backlogs — chronic bottlenecks in developed markets — now sit squarely in the path of load that wants to connect today, not in five years.

For policymakers, the IEA's framing poses an uncomfortable arithmetic question: how to reconcile accelerating consumption with generation and network investment cycles that still run on decade-long timelines.

The report positions electricity as the fastest-growing segment of final energy demand, a structural shift rather than a cyclical rebound. Data centers alone account for a meaningful share of incremental load, and the IEA expects that share to keep expanding.

The watch item: whether grid investment and interconnection processing can close the gap with demand before reliability margins tighten in the markets leading the surge. The IEA's next annual assessment will show whether 2026's growth rate holds — and whether the bottlenecks eased or widened.