ABC News is commemorating America's 250th anniversary with "Disney Celebrates America," a 24-hour multi-platform broadcast event that commenced on Friday, July 3, and will conclude on Saturday, July 4. The extensive coverage spans all 50 states and is spearheaded by ABC News World News Tonight anchor David Muir.

The initiative aims to provide a comprehensive look at the nation's history and current celebrations as it reaches this significant milestone. The programming includes a variety of content designed to engage viewers across different platforms, highlighting both historical context and contemporary festivities.

Key programming highlights include a special artistic event at the Statue of Liberty, offering viewers a rare glimpse inside the iconic monument, beginning at 10 p.m. ET on July 3. As midnight struck on July 4, ABC News broadcasted the first parade of the day in Gatlinburg, Tennessee. "Good Morning America" presented a three-hour special featuring co-anchors Robin Roberts, George Stephanopoulos, and Michael Strahan sharing their personal American journeys.

Following "Good Morning America," ABC News anchors and correspondents will explore the "7 Wonders of America," showcasing the country's geography, cultural heritage, and pivotal historical moments. The afternoon will feature ESPN's broadcast of the finals of The Nathan's Famous Hot Dog Eating Contest, with notable competitors Joey Chestnut and Miki Sudo returning to Coney Island.

The celebrations are taking place amidst significant heat across parts of the country. In Washington, D.C., the Great American State Fair was temporarily closed due to dangerous temperatures, with the heat index forecast to reach 113 degrees Fahrenheit. Organizers encouraged attendees to prepare for extreme heat, with police urging guests to bring ample water for the Capitol Fourth Concert at the U.S. Capitol.

Similarly, in Philadelphia, the Salute to Independence Semiquincentennial Parade scheduled for Friday was canceled due to dangerous heat wave conditions, as reported by Philadelphia ABC station WPVI. These weather-related disruptions underscore the challenges of large public gatherings during the summer months, particularly in historical celebrations.

"Disney Celebrates America" is designed to be a landmark event, bringing together various ABC News divisions to offer a unified perspective on the nation's anniversary. The broadcast intends to capture the spirit of the country through a mix of historical retrospectives, live event coverage, and personal stories.

Further details on specific segments and guest appearances are expected throughout the 24-hour broadcast. The event serves as a significant undertaking by ABC News to mark a pivotal moment in American history, combining traditional news coverage with celebratory programming.