---
title: "The US Declares a Power Emergency on Its Biggest Grid"
description: "The US Department of Energy issued an emergency order for PJM, the country's largest power grid, as a record-breaking heat wave threatened to push demand toward an all-time high. Strikingly, the order lets the grid curtail the very data centers now driving America's electricity crunch — a collision of extreme heat and the AI boom."
category: "Markets"
category_url: https://boursel.com/category/markets
author: "Hannah Blackwood"
published: 2026-07-01T00:48:00.000Z
updated: 2026-07-01T00:48:00.000Z
canonical: https://boursel.com/article/the-us-declares-a-power-emergency-on-its-biggest-grid
tags: ["energy", "electricity", "grid", "data-centers", "markets"]
---
# The US Declares a Power Emergency on Its Biggest Grid

The US Department of Energy issued an emergency order for PJM, the country's largest power grid, as a record-breaking heat wave threatened to push demand toward an all-time high. Strikingly, the order lets the grid curtail the very data centers now driving America's electricity crunch — a collision of extreme heat and the AI boom.

The US just took an emergency step to keep the lights on. The **Department of Energy** issued an **emergency order** for **PJM Interconnection** — the nation's largest grid operator, serving about **67 million people** across 13 states — as a punishing **heat wave** threatened to drive electricity demand to record levels, [Bloomberg reported](https://www.bloomberg.com/news/articles/2026-06-30/emergency-ordered-for-largest-us-power-grid-as-record-heat-nears).

## What the order does

Using **Section 202(c) of the Federal Power Act** — a rarely-invoked emergency power — Energy Secretary **Chris Wright** authorized PJM to run power plants **at maximum output**, even beyond normal **environmental limits**, and to take last-resort steps to avoid **blackouts**, [per the DOE](https://www.energy.gov/ceser/federal-power-act-section-202c-pjm-interconnection-pjm-order-no-202-26-06). The order runs across the peak-heat days of **July 1-2.**

The most striking provision: PJM can **curtail large data centers** with their own backup generators — ordering them to switch to on-site power — as a last resort before cutting power to households.

(Explainer: a **grid operator** like PJM balances electricity supply and demand across a region in real time; **peak demand** is the moment consumption is highest — here, a hot afternoon with air-conditioners everywhere running at once.)

## Why the grid is on the edge

The trigger is **heat**: PJM forecast demand approaching **163,000 megawatts**, near its all-time record set back in 2006, as temperatures neared the mid-90s Fahrenheit — with some generators already offline for maintenance.

But the deeper story is **structural.** After two decades of **flat** US electricity demand, consumption is **surging again** — and the biggest driver is the **AI data-center boom**, alongside broader electrification. Those energy-hungry computing hubs are straining a grid that wasn't built for fast growth. The strain shows up in **prices**: in PJM's most recent capacity auction (which pays generators to be available), prices **soared** — from roughly **$29** per megawatt-day to about **$329**, [the energy think tank IEEFA noted](https://ieefa.org/resources/projected-data-center-growth-spurs-pjm-capacity-prices-factor-10) — a jump analysts largely attribute to data-center demand, and one that flows through to household bills.

## The trade-off

Emergency orders like this spark a real debate:

- **Reliability advocates** — including grid regulators — say they're essential: blackouts in extreme heat can be **deadly** and knock out hospitals and water systems.
- **Critics** — environmental groups and some state officials — counter that the orders prop up **aging fossil-fuel plants** and **waive pollution limits** on smog-heavy days, adding **costs** that ratepayers ultimately bear, rather than fixing the underlying supply shortage.

## Why it matters

For **households**, it's a warning that summer heat can now push the grid to its limit — and that electricity **bills are climbing** as demand outruns supply. For the **AI industry**, the data-center-curtailment clause is a milestone: the very buildout powering the AI boom is now **first in line to be switched off** when the grid is stressed, a sign that **power — not chips — may be AI's binding constraint**, a theme Boursel has tracked. And for **markets and policymakers**, it underscores an enormous coming need for **investment** in generation and transmission. Boursel takes no side on energy policy; the takeaway is that after 20 flat years, **US electricity demand is roaring back** — and the grid, for now, is scrambling to keep up.

## Sources

- [Federal Power Act Section 202(c): PJM emergency order](https://www.energy.gov/ceser/federal-power-act-section-202c-pjm-interconnection-pjm-order-no-202-26-06)
- [Emergency ordered for largest US power grid as record heat nears](https://www.bloomberg.com/news/articles/2026-06-30/emergency-ordered-for-largest-us-power-grid-as-record-heat-nears)