When the grid gets desperate, your local power company now has federal backing to pull the plug on the data centers before it pulls the plug on you.

The U.S. Department of Energy issued an order Monday confirming that PJM Interconnection, the grid that covers 13 states from New Jersey to Illinois, has the legal authority to curtail data centers during severe power emergencies. As a last resort to prevent rolling blackouts, grid operators can cut electricity to those facilities and force them to run on their own backup generators instead.

The DOE's own language was blunt: it declared that a "statutory emergency exists" in PJM's territory, citing a sudden surge in demand, a shortage of generating capacity, and what it called "other causes."

Why this is happening now

PJM serves the largest concentration of data centers in the world. The Mid-Atlantic corridor, particularly Northern Virginia, holds the physical infrastructure behind vast stretches of the internet: cloud storage, streaming, AI computing, financial transactions. That infrastructure runs on enormous amounts of electricity, and its appetite has grown faster than the grid's ability to keep up.

The result is a system where supply is straining against demand in ways that weren't anticipated even a few years ago. PJM is working through a series of broader reforms to stabilize that balance, but the DOE order addresses what happens in the meantime, when the gap between what the grid can produce and what it's being asked to deliver gets dangerous.

The mechanism is straightforward: grid operators already have tools to reduce electricity use during emergencies. Curtailment, cutting power to large industrial users, is one of those tools. What the DOE order does is clarify that data centers fall within PJM's authority to curtail, and that backup generation requirements apply to them.

What this means for ordinary life

For most people, the direct effect is invisible on a normal day. Data centers almost always have backup generators precisely because their operators cannot afford downtime. Under this framework, an emergency curtailment doesn't mean your Google search stops working or your bank's servers go dark. It means those facilities run on their own diesel or battery backup while the grid directs power elsewhere.

The more consequential implication is about priority. When a summer heat wave or a winter storm pushes a grid toward its limits, the question of who loses power first is not random. It is, in some sense, a policy choice. This order says that in PJM's territory, the answer tilts toward keeping homes, hospitals, and critical services online rather than keeping a server farm's utility bill running.

For the roughly 65 million people who live and work in PJM's footprint, that framing matters. Grid emergencies have grown more frequent as extreme weather events become more intense and as electricity demand climbs with electrification of heating, transportation, and industry. The data center boom has added a new, large variable to that equation.

The bigger tension this order reflects is structural. The United States is simultaneously trying to build out AI infrastructure at speed and maintain a reliable grid for everything else. Those two goals are not automatically compatible. Power demand from data centers is growing quickly enough that grid planners in PJM have described it as a fundamental challenge to long-term reliability planning. Building enough new generation to meet both needs takes years. Until that capacity arrives, the grid has to make hard choices about who gets power when there isn't enough to go around.

This order establishes, formally, where data centers sit in that hierarchy. Not at the top.