Live updates: Many communities in the Philadelphia region alter July 4th plans due to heat wave

Due to the extreme heat and hazardous weather conditions, the Marple Newtown 4th of July Parade is canceled, officials announced on Friday night.

Security measures are increasing across Philadelphia as America's 250th birthday gets underway and officials prepare for large crowds ahead of the Fourth of July.

Barriers, cameras and a visible law enforcement presence have been deployed around historic sites throughout the city. The security operation includes multiple agencies working together, including Philadelphia police, counterterrorism units, U.S. park rangers, SWAT teams and police departments from surrounding counties.

Visitors said the heightened security was noticeable.

Security ramps up in Philadelphia as America 250 celebrations begin

"It's great seeing the security; I've seen police officers out there," said Perry Loskamp of Long Island.

Officials say large-scale public events require extensive planning because they can be attractive targets for potential attackers.

"Our foreign adversaries who would love to embarrass the United States while it's celebrating its birthday," said Don Mihalek, a retired senior Secret Service agent.

Mihalek said there are no specific credible threats to the events but noted that security officials remain alert to a range of potential risks.

"But they are tracking a lot of threat activity, generally speaking from foreign state actors, lone wolf actors who look at mass gathering events as targets of opportunity," Mihalek said.

People visiting the city said they welcomed the visible security presence during the celebrations.

"It makes me feel safe seeing all the security," said Jennifer Schock of San Diego.

"I don't feel uneasy. It's a positive police presence," said Jay Smith of Old City.

Officials are encouraging attendees not only to feel safe but also to remain vigilant and report any suspicious activity.

"I'm not too worried. I'm not too concerned, but I am aware, very aware," said Shawn Coleman of Old City.

As the holiday festivities continue, law enforcement agencies will maintain a heightened presence throughout celebration areas while urging the public to stay alert and enjoy the events safely.

Beachgoers packed the shoreline in Sea Isle City on Friday as people arrived ahead of the Fourth of July holiday, seeking cooler temperatures near the ocean after a week of heat.

Traffic heading to the shore was heavy before the holiday weekend, but visitors said the beach made the trip worthwhile.

The beaches in Sea Isle City were crowded as families and groups settled in for a holiday weekend that coincides with the nation's 250th birthday celebration.

"Down here it's beautiful. Back home it's probably 105," said Rebecca Mauger of Boyertown, Pennsylvania.

Jersey shore draws crowds seeking relief from heat ahead of Fourth of July

"The breeze is incredible. The water feels great," said Kate Daly of Avon, Connecticut.

Beach tags were in high demand as visitors carried chairs, umbrellas and other gear across the sand. While air temperatures were more comfortable near the ocean, beachgoers said the sand remained hot.

"It's not too warm, but the sand, like when you come in, it's really hot; it burns your feet," said Maddy Daly of Avon, Connecticut.

Business owners along Sea Isle City's promenade said the hot weather has helped draw more visitors to the shore ahead of the holiday weekend.

"It's bringing more people down to the shore. And they come in in the mornings and later in the evenings. But the hot afternoons are not really too much," said Roberta Sessoms of Sessoms Nautical Gifts.

Lifeguards were also preparing for the influx of visitors. Sea Isle City Beach Patrol lifeguard Sam Ryan said ocean conditions were generally favorable, though swimmers should pay attention to currents.

"The ocean is actually pretty calm, which is nice. Lateral currents are a little bit stronger, so we are struggling to keep everybody out in front. But in terms of conditions, it's pretty safe," Ryan said.

Ryan noted that while temperatures were cooler near the water, beachgoers should still take precautions to avoid heat-related problems.

"Shade is obviously a big one. Also just being in the ocean a little bit to try to cool off. Even if you don't want to dunk your head under water, just being ankle, shin deep - something that'll help you regulate temperature," Ryan said.

Fireworks are planned for Saturday night in Sea Isle City, where many visitors traditionally gather on the beach to watch the display.

Some daytime events at the shore are being moved or cancelled because of the extreme heat, including Cape May's Fourth of July parade.

Because the July 4th parade in Philadelphia was canceled due to the extreme heat, a number of performers who traveled to the city from all over the country were forced to change their plans.

The Pulaski High School Red Raider Marching Band from Wisconsin, and the Sahuarita Mustang Marching Band from Arizona were both set to participate.

When Action News heard about what happened, we invited them to our studios in Wynnefield Heights to come and join forces and perform.

Watch an extended version of their performances here:

And watch out coverage on Action News:

Two marching bands scheduled to participate at Philadelphia's canceled July 4th parade visited The Yard at 6abc studios for a special performance.

Two bands scheduled to march in Philadelphia's canceled July 4th parade held a special performance at The Yard at 6abc studios.