PJM Receives Emergency Approval to Curtail Data Center Power During Heat Waves
May 20, 2026
PJM Receives Emergency Approval to Curtail Data Center Power During Heat Waves
The rapid expansion of data centers, fueled by the artificial intelligence boom, is placing unprecedented strain on the U.S. power grid. In a landmark decision highlighting the tension between digital growth and grid reliability, the Federal Energy Regulatory Commission (FERC) has granted PJM Interconnection emergency authority to temporarily curtail power to data centers during extreme heat events. This marks the first time the nation’s largest grid operator has received such explicit permission to interrupt service to large-scale computing facilities, signaling a major shift in how energy regulators view the sector’s impact on infrastructure stability.
Under the emergency order, PJM—which manages the electricity grid for 65 million people across 13 states and the District of Columbia—can now implement rolling curtailments for data centers when temperatures spike and reserve margins shrink. The approval comes after PJM warned that data center loads, which can draw as much power as a small city, could grow by more than 70% over the next five years. The operator had previously relied on voluntary demand response programs, but officials argued those measures were insufficient to prevent blackouts during peak summer months. “This is about protecting the entire system,” a PJM spokesperson said. “When every megawatt counts, we cannot afford to treat data centers as untouchable.”
The decision has immediate implications for the data center industry, which has long enjoyed priority access to power. Industry groups, including the Data Center Coalition, have voiced concerns that the curtailment authority could deter investment in the PJM region, which hosts major cloud hubs in Northern Virginia and Ohio. However, grid analysts counter that the order is narrowly tailored to emergency situations—likely affecting only a handful of days per year—and that data center operators can mitigate risks through on-site battery storage and backup generation. “The real message here is that the era of unlimited, guaranteed power for data centers is ending,” said an energy policy analyst. “Operators must now build resilience into their business models, not just their servers.”
Beyond the immediate operational impact, the FERC ruling sets a precedent for other regional grid operators facing similar challenges. The California Independent System Operator (CAISO) and the Electric Reliability Council of Texas (ERCOT) have both flagged data center growth as a key risk to grid reliability, and observers expect them to pursue similar emergency authorities. For the data center industry, the PJM order underscores a broader reckoning: as AI workloads surge, the sector must adapt to a world where power is no longer abundant on demand. Long term, this could accelerate investments in energy efficiency, grid-interactive data centers, and co-location near renewable generation—shifts that may ultimately redefine the industry’s relationship with the electric grid.
Source: datacenterknowledge
