America’s growing network of artificial intelligence data centers is placing unprecedented pressure on power grids, raising concerns about energy reliability during periods of peak demand. The North American Electric Reliability Corporation (NERC) has issued warnings that large clusters of energy-intensive computing facilities could create new challenges for grid operators, particularly during extreme weather conditions.

One of the biggest concerns comes from the PJM Interconnection, which serves nearly 70 million people across 13 states. Officials have warned that a combination of rising electricity demand, expanding data center operations, and summer heat waves could strain available capacity and increase the risk of emergency measures, including localized rolling blackouts if supplies become critically tight.

Experts also warn about the possibility of cascading failures. Because many data centers are concentrated in specific regions, a major transmission problem could trigger large facilities to switch to backup power simultaneously. Such sudden shifts in electricity demand and supply can place additional stress on surrounding infrastructure, creating challenges for grid stability and reliability.

The rapid expansion of AI-related facilities has sparked growing concern in some communities, with proposals for more than 100 local moratoriums on new data center developments. Residents and officials worry about higher utility costs, increased energy consumption, and potential impacts on local power systems. Meanwhile, technology companies are investing in alternative solutions, including dedicated energy sources and next-generation nuclear technologies, but many experts say managing the immediate strain on the grid remains one of the industry’s biggest challenges.