Extreme Heat Warning for New York City through the July 4th weekend | Live updates

Mayor Mamdani visited the cafeteria at the Carter Burden/Leonard Covello Older Adult Program in East Harlem on Thursday morning.

"We know it is going to be incredibly hot this weekend, being here is the perfect place to be," he told the seniors.

He joined them in cutting up lemons to make a refreshing cold lemonade. He then served it to the dozens of older adults and was greeted with smiles.

He was careful not to mix their coffee with his newly created refreshing drink.

"Staying hydrated is one of the best ways to stay safe," the mayor said

Broadway Library (40-20 Broadway in Astoria) and Whitestone Library (151-10 14 Road) are both closed on Thursday, July 2 for emergency maintenance.

The Whitestone Library was supposed to be acting as cooling center on Thursday during the extreme heat.

Con Edison reduced voltage by 8% in the northwest section of the Bronx and in the northern tip of Manhattan to protect equipment and maintain service as repairs are made amid the extreme heat.

The affected area in the Bronx includes 39,600 customers and is bounded by the Westchester County line on the north, the Harlem River on the south, the Hudson River on the west, Sedgwick Avenue and the Bronx River on the east. It includes parts, or all, of these neighborhoods: Riverdale, Marble Hill, Kingsbridge, and Van Cortlandt Park.

The affected area in Manhattan is bounded by West 155th Street on the south and stretches to the Harlem River on the north. It is bounded by the Hudson River on the west and the Harlem River on the east. The area includes 75,200 customers in the Inwood, Hudson Heights and Washington Heights neighborhoods.

As oppressive heat settled in on Wednesday, some diehard soccer fans ventured out to watch the big World Cup match.

New York is sizzling in this historic heatwave, but it's a special summer with all kinds of fans visiting for the World Cup.

The sunset did not provide much relief -- it was still hot and sticky and there was not much of a breeze off the Hudson either.

Sonia Rincon has more on how World Cup fans tried to beat the heat.

You could call this a warmup for the 4th, when all eyes will be on the fireworks over both rivers.

Mayor Zohran Mamdani announced earlier Wednesday expanded measures to help protect New Yorkers from the heat, like extended pool hours and cooling vans that can help or check on anyone suffering.

In the city, the heat and holidays traditionally mean an exodus of locals -- but others will be arriving for a taste of the Big Apple as it bakes.