Texas power grid faces record demand amid scorching summer heat, as soaring temperatures push electricity consumption to unusual levels across the state. According to the Electric Reliability Council of Texas (ERCOT), electricity demand reached an unofficial record of 85,967 megawatts (MW) around noon on Wednesday, surpassing the previous high of 85,508 MW set during the August 2023 heatwave. Demand continued to climb throughout the afternoon, with forecasts estimating a peak of 90,155 MW.

Despite the surge, the grid remained stable, supported by more than 109,300 MW of available generation capacity. With temperatures exceeding 100°F (38°C) across much of Texas, air conditioning usage has become the primary driver of record electricity consumption, highlighting the state’s growing energy needs during extreme weather events.

Heatwave Pushes Electricity Demand to Historic Levels

The ongoing summer heatwave has sent electricity demand soaring as millions of Texans rely on air conditioners to stay cool.

• On July 21, ERCOT logged 87,403 MW of demand, nearly 2,000 MW higher than the previous standing record.
• By 3 p.m. on July 22, real-time demand climbed even further to 90,027 MW, while available generation reached 113,543 MW, providing a comfortable reserve margin.

ERCOT noted that these figures remain preliminary and will be finalized after higher-quality meter data is reviewed through the market settlement process.

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Grid Remains Stable Despite Record Demand

Two Texas grid records today:
Highest demand ever: 87, 340 megawatts at 4:45pm CT (beating the record by nearly 2 GW)
New solar record at 34,665 MW
The two go together! When it’s extremely hot, as it often is in Texas, demand and solar production both shoot upward. #txenergy 1/ pic.twitter.com/k5dhZsYttk

— Doug Lewin (@douglewinenergy) July 21, 2026

Although the Texas power grid faces record demand amid scorching summer heat, ERCOT emphasized that the system continues to operate under normal conditions.

The state’s expanding electricity portfolio has played a significant role in maintaining grid reliability. Nearly 11,000 MW of additional generation capacity has been added in recent months, strengthening the system ahead of the peak summer season.

ERCOT’s latest reliability assessments estimate only a 0.21% chance of a grid emergency in July, rising to 5.96% in August and 4.38% in September.

Natural Gas Leads While Solar Makes Major Contribution

• Natural gas remains the backbone of the Texas electricity system, supplying more than 69,700 MW of generating capacity.

However, renewable energy continues to play an increasingly important role.

• During Wednesday’s peak demand, solar energy contributed more than 38% of total available capacity, while installed capacity includes approximately 40,586 MW of wind power and 39,926 MW of solar power.

This diverse energy mix has helped ERCOT meet rising demand without triggering emergency measures.

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Triple-Digit Temperatures Fuel Rising Electricity Use

The National Weather Service issued heat advisories for the Austin and San Antonio metropolitan areas, where temperatures exceeded 100°F, combined with high humidity levels.

Although temperatures are expected to ease back into the 90s by Friday, electricity demand is likely to remain elevated as cooling systems continue operating at full capacity.

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Growing Energy Needs in a Warming Climate

Texas continues to experience rapid population growth, expanding industrial activity, and increasing electricity demand, all of which place greater pressure on the state’s independent power grid.

The latest demand records demonstrate both the resilience of the ERCOT system and the importance of continued investments in power generation, transmission infrastructure, and renewable energy. As extreme summer heat becomes more frequent, maintaining a reliable and flexible electricity grid will remain essential for supporting millions of homes, businesses, and critical services across Texas.

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