--- title: "Power Utilities Warn the US Grid Is Buckling Under AI Data-Center Demand" description: "The boss of one of America's biggest utilities has warned that parts of the US grid risk blackouts as electricity demand — driven above all by AI data centers — races ahead of new supply. It's the physical flip side of the AI build-out: the same boom the BIS just flagged as a financial risk is also straining the power system." category: "Economy" category_url: https://boursel.com/category/economy author: "Rafael Ortiz" published: 2026-06-30T00:43:00.000Z updated: 2026-06-30T00:43:00.000Z canonical: https://boursel.com/article/power-utilities-warn-the-us-grid-is-buckling-under-ai-data-center-demand tags: ["electricity", "ai", "data-centers", "grid", "utilities", "economy"] --- # Power Utilities Warn the US Grid Is Buckling Under AI Data-Center Demand The boss of one of America's biggest utilities has warned that parts of the US grid risk blackouts as electricity demand — driven above all by AI data centers — races ahead of new supply. It's the physical flip side of the AI build-out: the same boom the BIS just flagged as a financial risk is also straining the power system. The AI boom needs somewhere to plug in — and the US power grid is straining to keep up. Executives at major utilities have been sounding the alarm that **demand for electricity is outrunning supply**, raising the risk of **regional blackouts** on the hottest and coldest days. Exelon chief executive **Calvin Butler** put it bluntly: "The warning lights are on," he said, warning the grid could "break down in different regions" without urgent action, [Fortune reported](https://fortune.com/2025/12/09/exelon-ceo-warning-lights-on-u-s-resilience-utility-prices-ai-demand-surge/). The warning has only sharpened as data-center growth accelerates. ## The demand shock The driver is no mystery: **AI data centers**. America's grid watchdog, the **North American Electric Reliability Corporation (NERC)**, has sharply raised its demand forecasts, with **data-center loads** accounting for a large share of projected growth — roughly a quarter of the rise in peak demand, [per Utility Dive](https://www.utilitydive.com/news/nerc-10-year-peak-demand-forecast-jumps-24-on-new-data-center-loads/810955/). NERC's latest reliability assessment lifted its ten-year **peak-demand** outlook dramatically from a year earlier, and flagged that **more than half** of North America's regional grids face elevated or high risk of falling short. These facilities are unusually demanding: a single large AI data center can draw as much power as a small city, and its load can swing up and down fast — a pattern the grid wasn't built for. (Explainer: **peak demand** is the maximum electricity drawn at once; the **reserve margin** is the cushion of spare capacity above it that keeps the lights on.) ## Supply can't keep pace The other half of the problem is **supply lagging**. Older **coal and gas plants** are retiring, while new generation and — crucially — new **transmission lines** are slow to build. Vast amounts of solar and wind capacity sit stuck in **"interconnection queues,"** waiting years for permission to plug in, and there are reported multi-year backlogs even for basic equipment like grid transformers. The result is **thinning reserve margins** in big regional grids such as **PJM** (the mid-Atlantic and Midwest) and **ERCOT** (Texas), exactly where data-center demand is concentrated. PJM, which serves tens of millions of people, has flagged a looming capacity shortfall within a couple of years. ## Who wins, who pays For **utilities and power producers**, surging demand is, paradoxically, good business — more load, pricing power, and a wave of investment in generation and grids. For **Big Tech**, it's a hard constraint: as Boursel has reported, AI firms are increasingly **"power-constrained,"** chasing electricity (and even nuclear restarts) to feed their data centers. For **households**, the squeeze tends to show up in **higher bills**, and utility chiefs have warned rates are heading up. ## Why it matters This is the **physical companion** to the financial warning Boursel led with today: the **BIS** cautioned that the ~$1 trillion AI data-center build-out is a **financial-stability** risk; the grid story is the **engineering** version of the same boom. The AI era's binding constraint keeps coming back to the **real world** — chips, yes, but increasingly **power, land and transmission**. The takeaway isn't that the lights are about to go out everywhere; it's that the **margin for error is shrinking**, fast, in specific regions, and that closing the gap will require an enormous, multi-year build-out of **generation and grid** — nuclear, gas, renewables and batteries alike. As Butler framed the urgency, the industry now needs "every electron" it can get. For investors, the read is that **power has become one of the most important inputs to the AI trade** — and one of its tightest bottlenecks. ## Sources - [Exelon CEO: the 'warning lights are on' for US grid resilience amid AI demand surge](https://fortune.com/2025/12/09/exelon-ceo-warning-lights-on-u-s-resilience-utility-prices-ai-demand-surge/) - [NERC forecasts peak demand to rise on new data-center loads](https://www.utilitydive.com/news/nerc-10-year-peak-demand-forecast-jumps-24-on-new-data-center-loads/810955/)