America’s offshore wind farms have already shown their ability to keep electricity flowing during brutal winter storms. Now, the clean energy resource has proved it can also bolster the grid during major heat waves. Earlier this month, as dangerously hot and humid temperatures settled over the eastern United States, two wind projects near New England consistently delivered hundreds of megawatts to the grid as residents cranked up their air conditioners.
The influx of wind reduced utilities’ reliance on dirty, expensive oil-burning peaker plants, which operate only when electricity demand is through the roof, according to the data firm Grid Status. Analysts compared how the regional system performed during the July heat wave and a sweltering stretch in June 2025, before much of the current offshore wind capacity came online. Oil provided nearly 10 percent of the region’s total power supply during peak-demand conditions on July 2, 2026 — that period’s hottest day — down from nearly 15 percent at the highest point on June 24, 2025.
That’s a drop of more than a gigawatt in oil-fueled generation between those two days. Part of the decline was due to slightly weaker overall demand during the July 2 peak than during last year’s event. But Grid Status said that stronger generation from the region’s utility-scale offshore wind farms was a key factor.
The projects are coming online despite repeated attempts by the Trump administration to block them. Read Next Biden’s climate law is dead. The energy transition might not be.
Jake Bittle The surge of hydropower delivered via the New England Clean Energy Connect power line, which started carrying electricity from Canada to Maine in January, also reduced peak oil use. Meanwhile, an abundance of rooftop solar installations significantly eased overall electricity demand during the heat wave. “Even if total demand was in line with last year, we would still be hundreds of megawatts below what the total [peak oil] burn would’ve been,” said Tim Ennis, a Grid Status analyst in Boston.
“We didn’t have to turn the oil on as hard at lunchtime because we had the wind and [hydropower line] online as well.” Ennis noted that offshore wind is often touted by experts for its ability to bolster grid reliability during winter. New England’s power system is becoming increasingly constrained in colder months, owing to the shift to electric …
Summary from source