“Sunday has been canceled,” the NYPD jokingly 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 following a Manhattan blackout last weekend, electricity company Con Ed reported roughly 12,000 scattered outages early Sunday evening, the vast majority in the boroughs of Brooklyn and Queens.

Inmates across the city were affected by these power outages: 3,700 inmates were without power at Brooklyn Detention Complex, and Otis Bantum Correctional Center on Rikers Island.

Con Ed asked customers in certain neighborhoods in southeast Brooklyn “to conserve energy while company crews work to repair equipment problems.” The utility also said it reduced voltage by 8 percent in those areas to maintain service as repairs were made.

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The city also directed office buildings to set thermostats no lower than 78 degrees through Sunday to reduce strain on its electrical grid. A day earlier, a commemoration of the 1969 moon landing planned for Times Square and an outdoor festival featuring soccer star Megan Rapinoe and musician John Legend were nixed because of the heat.

Fox News’ Jacqui Heinrich and The Associated Press contributed to this report.