As summer temperatures rise, so does electricity use. Layered on top of traditional seasonal patterns, demand is growing across the country, driven by data center expansion, electrification, and new manufacturing. That growth is happening faster than many long-term forecasts anticipated, putting added pressure on a grid that, in many places, has tighter reserve margins than in previous years.
Even so, the outlook for this summer is positive. Grid operators expect to have enough electricity to meet normal seasonal demand, though extreme heat and other conditions could put portions of the system under strain. Weather-driven spikes in electricity use, more narrow reserve margins, and growing reliance on emergency tools during periods of stress all point to a grid that is prepared but operating under more challenging conditions.
Competitive power suppliers and wholesale electricity markets are helping meet that challenge. Independent power producers are investing across a range of technologies and reliability solutions, preparing facilities for heavy summer use, and working closely with grid operators to help ensure power is available when customers need it most.
The Big Picture: Reliable Power, Even as Demand Climbs
In its 2026 Summer Reliability Assessment, the North American Electric Reliability Corporation (NERC) found that the power system should have enough supply to meet normal summer demand across all assessed regions – pointing to an improved reliability outlook for some regions compared to last year. That is an encouraging sign for consumers heading into the hottest months of the year.
Since last summer, the grid has added 58.5 gigawatts of new resources, including solar, battery storage, and 6.7 gigawatts of natural gas generation. At the same time, some grid operators have improved the way they forecast demand, which has helped provide a clearer picture of summer needs. NERC also points to lower-than-expected energy demands from large loads like data centers than foreseen in mid-2025 – due in part to these facilities not coming online as quickly.
Still, NERC makes clear that the outlook is not without challenges. Even with revised load forecasts, electricity demand continues to grow, rising by more than 11 gigawatts since last summer across NERC’s assessment areas. In some regions, extreme heat, drought, wildfire risk, or transmission bottlenecks could create difficult operating conditions. In other words, while the grid is expected to be reliable, there is less room for error during periods of very high demand or extreme weather.
That is where competitive power markets matter. They help attract private investment in the resources needed to meet growing demand, utilize long term planning to anticipate and price in demand, and give generators incentives to be available and ready when the grid needs them most.
A Region-by-Region Look at Summer Reliability
- PJM expects to have enough generation to meet normal summer demand. The region forecasts peak demand of about 156,400 megawatts, with roughly 180,200 megawatts of generation capacity available, plus demand response that can help lower stress on the system when needed. Even so, PJM has said it may still need to use emergency tools during extreme conditions – just this week, it issued a Hot Weather Alert and Maximum Generation and Load Management Alerts to ensure the system would be prepared, while also activating demand response customers. The overall message is clear: the region is prepared, but operators are on alert and prepared to coordinate with generators to keep the power flowing.
- The New York Independent System Operator expects the system to remain reliable this summer, but the margin between expected supply and demand is especially tight. NYISO has said its reliability margin under baseline summer conditions is the lowest in recent history. That makes dependable power supplies and strong operational planning especially important during heat waves, when electricity use rises quickly.
- The Southwest Power Pool expects it will likely have enough generation to meet summer electricity needs, even as warmer-than-average temperatures and drought remain concerns in parts of the region. The outlook is generally positive, but weather will play a major role in how comfortable operating conditions are throughout the season.
- The California ISO expects to enter summer with a surplus of capacity, supported by major additions to the grid in recent years. Since 2020, the state has added more than 30 gigawatts of new resources, helping strengthen reliability. At the same time, California continues to face familiar summer risks, including extreme heat and wildfires, which means preparation remains essential.
- MISO’s capacity auction cleared above reserve requirements, a positive sign heading into summer. The region still faces uncertainty from weather conditions that can vary widely across its large footprint, and seasonal storm risks remain important to monitor. Even so, the summer outlook suggests the region is entering the season with a solid foundation.
- Summer is typically when New England sees its highest demand for electricity, and ISO New England expects to have enough resources on hand – with nearly 29,000 MW available to meet a projected peak of 25,288 MW under normal conditions. ISO-NE highlights a variety of generating resources, along with imports from New York and Canada and the recent connection of several new large energy sources including the New England Clean Energy Connect (NECEC) transmission line, the Vineyard Wind offshore wind farm, and several grid-scale battery projects. Should very hot and humid weather drive demand higher, the grid operator can implement several tools to maintain reliability.
How Competitive Power Generators Are Preparing for Summer
The overall summer outlook is positive: the grid is expected to remain reliable under normal conditions. But it is also clear that the system is feeling the strain of rising electricity demand, tighter operating conditions, and more frequent extreme weather.
Competitive power suppliers help meet that challenge every day. They invest private capital in new generation and upgrades to existing facilities. They maintain a diverse mix of power resources so the grid is not overly dependent on any one source of electricity. And they spend months preparing for summer by coordinating fuel supply, completing seasonal maintenance, testing equipment performance under high-temperature conditions, adjusting outage schedules where needed, and getting equipment ready for extreme heat. They also coordinate fuel deliveries, and work with grid operators to schedule outages during lower-demand periods whenever possible.
This preparation matters. During periods of prolonged stress, thermal generation remains an essential part of keeping the lights on. Batteries and solar are contributing more than ever. Demand response helps reduce pressure when usage spikes. Together, these resources support a more reliable and responsive system.
Competitive Power Market Reliability Planning
Competitive power markets also matter for customers. In restructured markets, private companies invest in generation and reliability solutions, helping meet electricity needs without putting all costs directly on customers through regulated utility rates. That market-based approach supports innovation, efficiency, and reliability at a time when all three are needed.
Competitive power markets help maintain reliability by rewarding generators that are available when electricity demand is highest. Through capacity markets, energy markets, and ancillary service markets, grid operators send price signals that encourage investment in generation, fuel security, storage, and flexible resources that can respond quickly during periods of system stress. Those market structures help ensure the grid has access to both everyday electricity supply and reserve resources that can be called upon during emergencies.
Resource diversity also plays an important role in reliability. Natural gas, nuclear, coal, hydro, renewables, battery storage, and demand response each contribute different reliability attributes that help the grid respond to changing weather conditions and usage patterns throughout the day.
In restructured markets, grid operators continuously monitor expected electricity demand and available supply, adjusting dispatch schedules and coordinating with generators in real time to maintain system balance. During periods of extreme heat, operators may commit additional generation resources ahead of time, secure reserve power supplies, or issue conservation appeals to reduce strain on the system before reliability becomes threatened.
More Reliability Tools: Data Centers and Backup Generation
Grid operators are also exploring additional reliability tools as electricity demand grows, including agreements that ask some large electricity users, such as data centers, to temporarily rely on their onsite backup generation – rather than the grid – during periods of peak demand or system stress. These arrangements can help reduce pressure on the grid during extreme conditions while maintaining reliability for consumers. This week, for example, the U.S. Department of Energy issued an order authorizing PJM to direct the deployment of customer-owned backup generation facilities if needed to help avoid any disruptions for residential customers. PJM noted that the special authorization “offers one more tool to minimize the risk of residential customers and other customers without backup generation from experiencing outages.”
Staying Cool Starts With a Reliable Grid
The power grid is expected to be ready for summer, and competitive power suppliers are helping keep it that way. While hotter weather, growing demand, and tighter operating conditions mean grid operators will need to stay alert, independent power producers across the country are investing, preparing, and performing to support reliable service.
What You Can Do
For consumers, the simplest ways to help stay cool are also practical: use major appliances during off-peak hours when possible, set thermostats efficiently, and pay attention to local conservation alerts during extreme heat. And in many communities, competitive power suppliers and local utilities also support summer relief efforts, including outreach and assistance programs that help vulnerable households manage the season safely.
