PHILADELPHIA (WPVI) -- The birthplace of the nation is celebrating the Fourth of July and America's 250th birthday as festivities kick into high gear in Philadelphia.
However, extreme heat is forcing many event cancellations.
An Extreme Heat Warning remains in effect for the entire Philadelphia region. Temperatures in the city are expected to be around 100 degrees through Saturday.
For the latest forecast, visit 6abc.com/Weather.
Meanwhile, ABC is marking America's 250th anniversary with 24 hours of unparalleled programming called "Disney Celebrates America."
Joey Chestnut is a champion once again at the Nathan's Famous hot dog eating contest at Coney Island.
Chestnut captured the men's title for the 18th time, downing 66 dogs.
Competitors consume as many hot dogs and buns as possible in 10 minutes, usually dunking the wieners in water first to make them easier to swallow.
Miki Sudo captured her 12th title at the Nathan's Famous hot dog eating contest at New York's Coney Island on Saturday.
Sudo downed 38.75 dogs to win the annual event again. She also holds the women's record of 51 dogs.
Competitors consume as many hot dogs and buns as possible in 10 minutes, usually dunking the wieners in water first to make them easier to swallow.
Coverage of the men's competition airs at 12 p.m. ET on ESPN2, and will re-air on the same channel at 4 p.m. ET. ABC will simulcast coverage beginning at 12:30 p.m. ET for 30 minutes.
Special exhibits at the Museum of the American Revolution in Philadelphia's Old City brings to life journey that sparked the American experiment in liberty, self-government and equality.
You can also see one of the first printings of the country's founding document: the Declaration of Independence.
On the night of July 4, 1776, our founding fathers tasked John Dunlap, a Philadelphia printer, to make the broadsides so they could be dispatched as an announcement to the world of the break with Great Britain.
He printed 200, but only 26 are believed to survive today.
One of those is now back in Philadelphia for the first time since 1776, at the Museum of the American Revolution. It's on loan from the UK National Archives and was originally Jonas Phillips' copy.
Phillips was a Jewish merchant in Philadelphia.
The museum showcases how the Declaration of Independence became one of the most important political documents in American history, serving as fuel and inspiration for the black and gay Civil Rights movements, and sparked revolutions in other countries.
The museum also has a number of interactive, fun activities for the whole family. If you come before 1:45 p.m., you can print your own one-word declaration.
At 1:15 p.m. and 3:15 p.m., you can watch a 30-minute one-woman theatrical performance, portraying the life and experiences of Elizabeth Freeman, also known as Mumbet. She was a Massachusetts woman who sued for her freedom from enslavement and won.
Also throughout the day, you can hear from historians in costume.
The museum is open Saturday until 6 p.m.
Valley Forge National Historical Park gives live readings of the Declaration of Independence amid Fourth of July celebrations for America's 250th birthday.
Listen to the powerful words that set the American experiment into motion on the lawn behind the Maurice Stephens house.
For more information, visit the Valley Forge National Historical Park website.
