Nearly one million lose power as severe storms sweep Midwest, Northeast and Ontario
Severe thunderstorms driven by extreme heat and abundant moisture swept across the Midwest and Northeast on Friday and Saturday, July 3 and 4, 2026, toppling trees, damaging power infrastructure and disrupting holiday travel across one of the busiest weekends of the year. Utility crews continued restoration efforts after hundreds of thousands of customers lost electricity across multiple states and parts of Ontario.
Powerful thunderstorms swept across parts of the Midwest and Northeast ahead of the Fourth of July holiday weekend, knocking out electricity to hundreds of thousands of customers, damaging homes and infrastructure, disrupting travel and complicating recovery efforts as dangerous heat continued across much of eastern North America.
The storms developed along the northern edge of a sprawling heat dome, where extreme heat, abundant moisture and favorable upper-level winds created conditions for multiple rounds of severe thunderstorms.
Damaging straight-line winds, torrential rain, frequent lightning and localized flooding accompanied the storms as they tracked eastward.
Nearly one million electricity customers across the affected regions lost power at the peak of the storms, according to PowerOutage.us and regional utility data. The total combined widespread outages caused by the storms on July 3 and 4 in the United States with customers in Ontario who remained without electricity after severe Canada Day storms earlier in the week.
Three children died after a recreational boat capsized on Geneva Lake during severe storms on. Six other occupants, including another child, were rescued.
Michigan was among the hardest-hit states. Wind gusts reached 130 km/h (80 mph) in western Michigan before storms moved into the Detroit metropolitan area, bringing down trees, utility poles and power lines.
According to PowerOutage.us, approximately 385 000 customers in Michigan were without electricity at the peak of the outbreak. DTE Energy reported more than 325 000 customer outages across southeastern Michigan at the height of the storm.
Heavy rainfall also caused localized flooding, including temporary closures on portions of the Southfield Freeway, while emergency crews responded to numerous reports of fallen trees, blocked roads and damaged power lines.
The storms also disrupted Fourth of July celebrations. Royal Oak Taco Fest closed early because of dangerous winds, while several communities postponed or canceled parades, concerts and fireworks because of storm damage, ongoing cleanup efforts or safety concerns.
DTE Energy deployed hundreds of line workers, contractors and mutual-aid crews and said approximately 95 percent of affected customers were expected to have power restored by the end of July 5. Indiana Michigan Power also reported about 30 000 outages in Michigan and several thousand more in Indiana.
As the outbreak expanded eastward, additional severe thunderstorms moved across the Great Lakes into Pennsylvania, New Jersey and New York.
In New Jersey, powerful winds caused extensive tree damage. Plainfield declared a state of emergency after dozens of trees fell, many bringing down power lines and blocking streets. Neighboring communities also reported widespread wind damage and scattered outages.
The state recorded roughly 180 000 outages. Meanwhile Pennsylvania reported more than 66 000 outages, while Illinois and Ohio each reported tens of thousands of customers without electricity.
Storms downed trees and power lines in western and central New York overnight on July 3. Utilities including RG&E and NYSEG later said they had restored power to more than 41 000 customers after staging crews ahead of the storms.
Con Edison reported roughly 17 000 outages in the New York City area and urged customers to conserve electricity as high temperatures continued driving demand.
The storms struck while much of the eastern United States remained under an intense heat wave that had already produced record or near-record temperatures. The prolonged heat increased electricity demand, while storm damage made restoration efforts more difficult.
PJM Interconnection issued a Maximum Generation Alert and a Load Management Alert as record electricity demand, generator outages and transmission constraints strained the regional power grid. PJM said the alerts were issued to maximize available generating capacity and maintain grid reliability during the prolonged heat wave, while storm-related outages added to operational challenges.
Utilities continued restoring power after severe thunderstorms during the Canada Day holiday left hundreds of thousands of customers without electricity in Ontario.
Hydro One reported approximately 168 000 customers lost power during the Canada Day storms, while Hydro Ottawa said flooding and submerged electrical equipment delayed restoration in some areas.
Although Ontario’s largest outages resulted from the earlier storms rather than the July 3–4 U.S. outbreak, thousands of customers remained without electricity during the holiday weekend, contributing to the nearly one million combined outages recorded across the affected regions during the multiday severe weather period.
Downed trees, damaged utility infrastructure and localized flooding disrupted transportation across parts of the Midwest and Northeast. Flooding temporarily closed sections of the Southfield Freeway in Michigan, while airlines reported delays as storms moved through busy holiday travel corridors.
References:
1 Storms Cause Power Outages for 1 Million in Midwest, Northeast and Ontario – The New York Times – July 4, 2025
2 Heat wave disrupts Fourth of July events across US, strains power grids – Reuters – July 4, 2026
3 3 dead and others rescued after boat capsizes on Wisconsin lake amid storms – AP– July 4, 2026
Featured image: Tree downed in Pennsylvania after a powerful clipper storm left over 70000 without power on November 5-6, 2025. Credit: PPL Electric Utilities
I am an Assistant Editor and Severe Weather & Science Journalist at The Watchers, specializing in real-time severe weather coverage, geophysical event reporting, and research-driven scientific analysis. You can reach me at rishav(at)watchers(.)news.
Commenting rules and guidelines
We value the thoughts and opinions of our readers and welcome healthy discussions on our website. In order to maintain a respectful and positive community, we ask that all commenters follow these rules.