As the heat wave caught much of the country on Sunday, outages reported in several states left hundreds of thousands of customers in the dark.
The crew worked to restore the power after heavy storms over two days knocked out power to more than 800,000 Michigan homes and businesses.
Two tools said it could take to Wednesday to restore power to everyone.
Detroit-based DTE Energy said Sunday afternoon about 600,000 customers were hit by storms in southeast Michigan on Friday and Saturday.
Officials said it is the biggest storm to beat the region this year.
Their estimate of outbreaks grew all day as the crew worked. The weather knocked more than 2000 lines.
The tool said it had restored power to 250,000 customers and was expected to recover all power by Wednesday.
Jackson-based Consumers Energy said about 220,000 customers were generally affected. The tool said it hoped to restore power to everyone by Tuesday.
The tool said the storms pounded over 2,600 wires.
FLORIDA COURSE IS "FULL LOSS" AFTER FOLLOW-UP EXAMINERS HAVE THE TIME OF LIGHTING
National Weather Service reported high temperatures for July 20 were recorded Saturday at the weather stations in Atlantic City, N.J .; New York City; Westfield, Mass. & # 39; Manchester, N.H .; and Wallops Island, Va.
From the Carolinas to Maine, daytime altitude reached the upper 90's Sunday. Along with high humidity, the temperature felt as hot as 110 degrees Fahrenheit in places.
The New York Police Department asked the residents to take it easy.
"Sunday has been canceled," NYPD ghosting tweeted ]. "Stay indoors, nothing to see here. Really we got this."
In New York City, where all eyes were on the power grid even before the hot weather after a blackout in Manhattan this weekend, the electricity company Con Ed reported about 12,000 scattered eruptions early Sunday evening, the vast majority of cities in Brooklyn and Queens.
Natives throughout the city were affected by these power outages: 3,700 inmates were out of power at the Brooklyn Detention Complex and Otis Bantum Correctional Center on Rikers Island.
Con Ed asked customers in specific neighborhoods in southeastern Brooklyn "to save energy while the company's crew is working to repair equipment issues." The tool also said it reduced the voltage by 8 percent in these areas to maintain service as repairs were made.
CLICK HERE TO GET FOX NEWS APP
The city also directed office buildings to set thermostats no lower than 78 degrees through Sunday to reduce the load on the electrical grid. A day earlier, a memorial of the 1969 moon landing was scheduled for Times Square and an outdoor festival with football star Megan Rapinoe and musician John Legend nixed due to the heat.
Fox News & # 39; Jacqui Heinrich and The Associated Press contributed to this report.