US regulatory agencies approve data center backup generator deployment for power grid stabilization during demand peaks.

On July 3, the U.S. Department of Energy authorized PJM, the grid operator, to tap into backup generators at data centers to help stabilize the electricity system. This decision came in response to a severe heatwave sweeping across central and eastern U.S. states, where temperatures in some areas are expected to reach between 35 and 41°C (95–106°F).

PJM, which manages the power grid across 13 states and the District of Columbia, can now access over 35 gigawatts of unused backup capacity nationwide—an amount of power sufficient to supply roughly 26 million homes. Virginia, home to the world's highest concentration of data centers, gives PJM extra resources to keep the grid stable during extreme weather events.

Although the permission is now in place, PJM has not yet activated the measure. Notably, this authorization does not cover hospitals, 911 emergency services, water treatment plants, defense facilities, or aviation control centers.

PJM has received similar emergency powers during past heatwaves and cold snaps, demonstrating its readiness to act in critical situations. The increased strain on the power grid during this heatwave calls for swift measures to maintain system stability.

This move by the U.S. Department of Energy highlights the growing need to adapt energy infrastructure to climate change and extreme weather. Leveraging data center backup capacity could become a key strategy for ensuring a steady power supply, particularly during peak demand. However, PJM's decision to hold off for now suggests it is monitoring weather developments before activating these reserves.