Live updates: Philadelphia's 'Salute to Independence' parade canceled amid heat wave

Dozens of train enthusiasts gathering in Berks County to catch a glimpse of a historic locomotive were overcome by the extreme heat Thursday as temperatures soared across the region.

Chopper 6 was overhead at Reading Outer Station along Pottsville Pike in Muhlenberg Township, where authorities say first responders treated more than 100 people for heat-related injuries.

More than 35 treated as heat overwhelms crowd gathering to see historic locomotive 'Big Boy'

"Multiple people began collapsing from what appeared to be mostly heat-related medical episodes. Infants several months old to the elderly began to experience heat-related symptoms. On scene medical personnel immediately became overwhelmed with the number of patients," said Muhlenberg Township Police Chief Randall Hoover.

One person went into cardiac arrest and was revived at the scene, officials said.

According to Hoover, 35 people needed to be taken to an area hospital for further evaluation

The The U.S. Army Field Band & Soldiers' Chorus concert that was planned for Thursday, July 2, in Philadelphia has been canceled due to the extreme heat.

The concert was set to begin at 7 p.m. on Independence Mall.

The performance was to be headlined by award-winning performing artist Queen Latifah and along with a special performance by Miss America 2026, Cassie Donegan.

There are dozens of July 4th fireworks displays happening across the entire Delaware Valley.

Philadelphia's will blast off a display fit for the birthplace of America around midnight on July 4, following the One Philly Unity Concert along the Ben Franklin Parkway.

Check out our full list to see where to find them in your neighborhood HERE.

The City of Philadelphia has released a list of road closures ahead of the many events taking place across the city to celebrate America's 250th birthday on July 4.

The Wawa Welcome America Festival runs June 24 through July 4, bringing visitors from all over the country to celebrate these historic events in Philadelphia.

Festival events will include concerts on Independence Mall, fireworks, neighborhood block parties, Wawa Hoagie Day, free museum days and a parade featuring representatives from all 50 states and U.S. territories.

The City encourages residents, businesses, commuters, and visitors to plan ahead and stay informed about transportation impacts and event updates. To receive alerts, text AMERICA to 888-777.

See list of road closures HERE.