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A September 2026 University of Alberta review of how AI data centres affect power grids lists a growing run of sudden load-loss events, in which data centres drop off the grid together after a fault, including: A July 2026 line fault in Northern Virginia disconnected over 3 GW of data-centre load, the largest such event on record
Verified 2026-10-25
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When a cluster of data centres drops off the grid at once, voltage can swing, so grid planners now treat these sites as a reliability risk, not just demand.
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- American Electric Power, one of the largest US utilities, which counts hyperscalers and manufacturers among its new large customers, signed fresh load commitments in the third quarter of 2026 and now expects its contracted extra load to reach 84 GW by 2031 AEP signed 15 GW of new load commitments in a single quarter
- AI data centres worldwide reached a power capacity comparable to New York State at peak demand in 2025, which Stanford's AI Index puts at 29.6 gigawatts
- OpenAI does not disclose GPT-4o's resource footprint, so Stanford's 2026 AI Index Report turned to independent researchers' estimates of the water needed to cool the servers behind it — as much as 1.58 million kilolitres a year — more than 1.2 million people drink annually
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