Dangerous heat to hit New York City through the July 4th weekend | Live updates

The entire area is preparing for extreme heat in New York City.

Hundreds of cooling centers will be open in places like the Javits Center, schools and libraries.

Outdoor pools will stay open late.

"Be prepared to listen to your body. If you're starting to show signs of a heat injury. Heat rash, sweating profusely, maybe a little lightheaded, you've got to get to air conditioning and get back to sipping water. If you do those three things, we'll get through this together," NYS Health Commissioner James McDonald said.

The city's health department says 21 New Yorkers died of heat stress last year.

19 of those deaths were attributed to the heat wave last June.

This one will be longer and hotter.

"We are activating more than 2200 link NYC kiosks to display real-time directions to the nearest NYC cooling center. We are also launching a fleet of 15 never-before-used cooling outreach vans," McDonald said.

Those vans will be staffed by nurses and paramedics.

They can also be sent to wellness checks on older adults. The city's health commissioner says watch for those signs of heat stress in yourself, and in those who might be vulnerable.

"Watch for them in your neighbors. In your parents, your grandparents, the elderly person that lives alone down the hallway. Because people who are most at risk from heat are often the people who are least likely to ask for help," Dr. Alister Martin Commissioner NYC Dept Of Health & and Mental Hygiene said.

NYC Mayor Zohran Mamdani updated New Yorkers ahead of an incoming stretch of extreme heat on Tuesday afternoon.

"These are extremely dangerous conditions and they will affect every part of our city," he said.''

Crystal Cranmore has more on how NYC is preparing for the extreme heat.

The MonmouthNJ 250: The Concert at ParkStage, scheduled for Friday, July 3, featuring Little Steven and the Disciples of Soul, has been rescheduled for Friday, July 17 at 5 p.m.

Officials say postponing the show is in the best interest for the public safety of the audience.

"The safety of concertgoers, County and Basie employees, and the artists performing is our highest priority," said Commissioner Director Thomas A. Arnone. "With an unprecedented heat wave forecast for the holiday weekend, the County, the Count Basie Center for the Arts, and Stevie Van Zandt have, out of an abundance of caution, postponed MonmouthNJ 250: The Concert from July 3 to July 17. We remain committed to providing a safe, enjoyable experience for everyone who attends ParkStage."

New York State Health Commissioner Dr. James V. McDonald says the next five days will be the most significant heat health risk that he's seen in his time as the commissioner.

He's urging people to carry water, know where air conditioning is, and to watch out for signs of heat injury.