Extreme Heat Triggers Capacity Deficiency in New England
Graph of load (dark orange), forecasted load (blue) and actual load including estimated behind-the-meter solar (orange) | ISO-NE
Jun 25, 2025
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ISO-NE declared a capacity deficiency, implemented a Power Caution and took extra actions to maintain grid reliability during what may have been the highest peak load since 2013, driven by extreme heat and humidity.
