The North American Electric Reliability Corp. has documented a significant surge in unavailable capacity across conventional power generation sources in 2025. Coal plants experienced a 39.8 terawatt-hour increase in unavailable energy, while natural gas facilities added 19.1 TWh to the nation's reserve depletion during the same period, raising fresh concerns about grid reliability.
The uptick in forced outages—unplanned shutdowns due to equipment failures or maintenance issues—signals potential strain on the power system's ability to respond to peak demand periods. As renewable energy sources continue to expand their share of the generation mix, the reliability of existing thermal plants becomes increasingly critical for grid stability during periods when wind and solar resources are constrained.
The trend underscores the complex challenge facing grid operators as they balance the retirement of aging fossil fuel infrastructure with the need to maintain adequate reserves. According to NERC, these rising outage rates may require closer monitoring of fuel supply chains, maintenance schedules, and equipment conditions across the thermal generation fleet.
