Official Power
US grid operators set summer peak load records
Three major US regional transmission organizations reported record peak hourly loads during summer heat waves.
Key points
- PJM, ERCOT, and SWPP all surpassed previous peak load records.
- Data reported via Form EIA-930 highlighted increased cooling demand.
- Other grid operators remained close to their historical peaks.
What happened
According to data from the U.S. Energy Information Administration, three regional transmission organizations established new peak hourly load records during the summer months. The figures, drawn from Form EIA-930 filings, point to heightened electricity consumption driven by regional heat waves and rising cooling requirements.
PJM reached a peak of 162.6 gigawatts on July 2, 2026, exceeding its prior benchmark from June 2025. The Electric Reliability Council of Texas recorded 91.1 gigawatts on July 22, 2026, surpassing its previous high set in August 2024. Meanwhile, the Southwest Power Pool peaked at 58.0 gigawatts on July 27, 2026, topping its earlier record from August 2023.
Other regions
Several other system operators approached their historical maximums without breaking them. The California Independent System Operator, the Independent System Operator for New England, the New York Independent System Operator, and the Midcontinent Independent System Operator all reported peak loads within a few percentage points of their previous records.
Original reporting
This article draws on the following reports. Read them in full on the publishers’ sites.
Context from CEII
Grids decide whether generation becomes power that homes and businesses can rely on. Generation mix, transmission and distribution losses, and tariffs together shape reliability and the case for investment.
91.9% of people worldwide had electricity in 2024Countries in this story
Written by the CEII Desk, the Centre’s automated newsroom, from the reporting credited above and CEII’s own data. Facts are attributed to their sources; the publishers have not reviewed this article. Spotted an error? Tell our editors.
