Data Center Power Demand to Jump 26% by 2026, Straining Grids

A Surging Appetite for Power

Global data centre electricity consumption is projected to climb 26% to reach 565 terawatt-hours by 2026, a trajectory that underscores how thoroughly artificial intelligence and cloud computing are reshaping global energy demand 1. That figure represents more than an industry footnote — it signals a structural shift in how much power modern economies must generate, transmit, and price, with consequences rippling far beyond server farms.

Grids Already Under Pressure

The strain is not theoretical. In the United States, PJM Interconnection, which coordinates electricity for roughly 67 million customers across 13 states, has repeatedly seen the price it pays generators to guarantee reliable power hit an imposed ceiling, a sign that capacity is struggling to keep pace with demand 2. Analysts now expect electricity prices in that region to keep climbing through 2030 as the grid strains under growing load 2. Texas offers an even starker illustration: the state's grid operator, ERCOT, has paused approvals for new data centers after a request queue for new capacity swelled to a staggering 474 gigawatts — a figure that dwarfs existing grid capacity. Compounding concerns about transparency, only 28 of 377 companies seeking connections met basic disclosure requirements, prompting regulators to hit the brakes before commitments outstrip what the grid can realistically supply 5.

A Global Pattern, Different Causes

While data centers are the marquee driver of new demand in wealthy, tech-heavy markets, grid stress is a worldwide phenomenon with varied roots. In Vietnam, an intense heatwave has pushed electricity demand to record levels, threatening blackouts as the national grid buckles under the added load of cooling systems working overtime 4. That mirrors a broader climate-driven trend in which extreme weather, rather than computing, is the proximate cause of surging consumption — but the effect on aging or undersized infrastructure is strikingly similar to what data-center growth is producing elsewhere.

At the extreme end, Cuba illustrates what happens when a grid fails to meet even baseline demand. The country has suffered its sixth nationwide grid collapse of 2026, with residents enduring electricity in brief 20-minute windows, cooking by candlelight, and rearranging daily life around blackout schedules — a crisis exacerbated by the effects of a long-standing U.S. blockade 3. Though the causes differ sharply from those in Texas or Pennsylvania, the underlying vulnerability is the same: infrastructure that cannot reliably match the electricity people and industries need.

Why It Matters

Taken together, these developments show that the conversation about AI's energy footprint is now inseparable from broader questions about grid resilience, pricing, and equity. Whether the stressor is a data center boom, a heatwave, or geopolitical isolation, utilities and regulators worldwide are being forced to confront the same fundamental mismatch between rising demand and the pace of infrastructure investment.