WASHINGTON (AP) — Festivities commemorating the 250th anniversary of American independence ramped up across the United States on Friday as demonstrations of national pride — and hints of political polarization — were balanced with efforts to stay safe as much of the country baked under extreme heat.

President Donald Trump was on his way to South Dakota to deliver a speech and watch fireworks at Mount Rushmore. And in a novel twist, there will be a ball drop in New York City's Times Square at midnight to usher in the July Fourth holiday with much the same revelry that is typically reserved for New Year’s Eve.

The sound of fighter jets on military flyovers shook the nation's capital. In New York City, Mayor Zohran Mamdani delivered his own address on the country’s 250th anniversary that cast America as a nation of contradictions “working each day towards the perfection in which it was conceived.”

By early afternoon in Washington, hundreds of people were roaming the grounds of the National Mall, home to The Great American State Fair. They snapped photos of the flyovers and tried to cool off inside tents that offered $9 lemonades and $23 turkey legs. Many were dressed in patriotic colors, their faces glistening with sweat.

[Photo Credit: AP Photo/Mark Schiefelbein] Military aircraft fly over the National Mall near the Eisenhower Executive Office Building

The activity culminates in the main event Saturday, when fireworks will erupt in communities across the U.S., along with backyard cookouts and block parties. Trump will deliver another speech at the National Mall in Washington before what is being billed as a historically massive fireworks show.

But for all the celebrations, there are also serious safety considerations as potentially record heat grips much of the Midwest and East Coast. Officials have warned those celebrating the holiday to stay hydrated and take air-conditioned breaks as needed.

Sky-high temperatures lead to cancellations and adjustments to the festivities

Philadelphia canceled its Salute to Independence parade Friday. The Great American State Fair in Washington shut down in the early afternoon before reopening at 5 p.m.

The National Weather Service has issued an extreme heat warning for much of the Midwest, mid-Atlantic and Northeast from eastern Kansas to southern Maine, including the cities of St. Louis, Indianapolis, Baltimore, Philadelphia, New York and Boston. The weather service said peak heat indexes, which combine air temperature with humidity, of up to 115 Fahrenheit (46.11 Celsius) are possible.

As the rest of the country struggled under stifling heat, the Pacific Northwest enjoyed temperatures in the 60s with even a few light showers.

World Cup soccer fans in Seattle were staying cool Friday as they got psyched up for Monday’s big game between the U.S. and Belgium. In the nearby suburb of Issaquah, Megan Kurowski, 31, brought her two dogs to the dog park so they could get some exercise before she went to work.

Kurowski said she was feeling positive about America’s 250th anniversary and was planning a possible paddleboard to watch the fireworks.

“Everyone’s just, from what it seems, been pretty excited about celebrating 250 years,” she said.

The holiday is unfolding at a unique time in the U.S. The anniversary has served as an opportunity for the country to reflect on its history while also reminding it of the political polarization of the moment.

On a holiday of unity, there is an undercurrent of division

In New York, Mamdani, a Democrat, did not mention Trump by name, but parts of his speech appeared aimed at the president’s divisive rhetoric.

“For generation after generation, we have been told that when the world has sent its people to our shores, it has not sent its best,” Mamdani said in an apparent reference to an a common criticism from Trump. “Those ideals upon which our nation was built — they are strong enough to endure any authoritarian regime, but only if we reach for them."

Freedom 250, an organization aligned with the White House, has come to rival America250, a bipartisan group founded by Congress a decade ago. Freedom 250 has organized much of the activity in Washington, including the Great American State Fair. America250 is behind the ball drops unfolding in many cities, including New York, and will host a concert in Los Angeles on Saturday.

About 4 in 10 U.S. adults feel “proud” about the country’s 250th anniversary, according to an April survey from The Associated Press-NORC Center for Public Affairs Research. Roughly 3 in 10 said “excited” describes their emotions.

Ahead of the holiday, auto technician Joe Fuqua-Bejarano, in Topeka, Kansas, sized up “what makes us awesome” as a people. It is clearly not the politics, in his view, but rather resilience.

“We’ve just all got to find unity somewhere, whether that’s in laughter or perseverance, and keep everybody cool,” he said from the fireworks stand where he is doing a booming business as a side hustle.

Christina Zhou, a 25-year-old research assistant from Cambridge, Massachusetts, said she would aim to “think about just things that are happening locally.”

“It feels a little bit more like within our own personal control," she said.

Jerry Chin of Newcastle, Washington, said he wasn’t aware that the U.S. was celebrating its 250th anniversary and planned to stay low-key around the holiday. He and his wife generally skip the fireworks and instead stay home with their fearful dogs to keep them calm.

“America’s a great place, but there are some concerns,” he said. Chin, 55, and his wife worry about healthcare and issues around staying healthy, but they also stress about politics.

At the National Archives in Washington, visitors made their way through the Rotunda to look at the Declaration of Independence, the Constitution and the Bill of Rights -- and to escape the heat outside.

Michael Dresdner, 60, traveled from West Orange, New Jersey, with his wife, Cindi, 57, and about two dozen other people to be part of the America 250 celebrations. He said their group of travelers included people on both sides of the political aisle -- and that is what gave him hope for the future of American democracy.

“We are all here, and we all love America,” he said.

[Photo Credit: AP Photo/Allison Robbert] Attendees dip their hands in ice water at the Great American State Fair on the National Mall

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Peoples reported from New York. Associated Press writers Martha Bellisle in Seattle, Anthony Izaguirre in New York, John Hanna in Topeka, Kan., Michael Casey in Cambridge, Mass., and Calvin Woodward, Didi Tang, Gary Fields and Nathan Ellgren in Washington contributed to this report.

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