MISO said 2025 was the most demanding summer since 2012, though it steered the grid with only a single maximum generation event.

MISO is poised to close the door on summer with an almost 122-GW peak while issuing several capacity advisories for MISO South.

MISO issued a slew of warning notices and operating instructions — especially in the South region — to help deal with oppressive July heat, forced generation outages and strained transmission.

MISO Midwest entered emergency status during the RTO’s first serious heat wave of the summer.

New York solar generation set an all-time peak record April 17, generating 4,809 MW in the noon hour, NYISO told the Operating Committee.

The preliminary results of PJM’s look ahead at the capacity available for this summer and the expected peak loads suggest that about 5.4 GW of demand response could be needed to maintain the 3.5-GW real-time primary reserve requirement.

MISO cautioned it’s likely in for heat waves and drought this summer with a slight chance it navigates a 130-GW peak in July.

MISO reported relatively lower costs and outages in August while it served its annual peak late in the month.

MISO said it managed a milder summer overall compared to previous years, though it weathered two hurricanes and escalated into emergency warnings during a heat wave.

MISO set its 122-GW summertime peak on the unofficial last week of summer, with widespread heat necessitating back-to-back maximum generation warnings.