An oppressive heat dome is wreaking havoc on Fourth of July celebrations in the nation's capital and across the country, prompting cancellations and schedule shifts as millions mark America's 250th birthday. Washington, D.C., scrapped its traditional parade late Friday and delayed the opening of the "Great American State Fair" and other events until later Saturday, with thunderstorms and rain also threatening to disrupt plans.

President Trump is set to deliver his Salute to America Celebration speech on the National Mall late Saturday evening, despite the sweltering conditions. The president has indicated the address will be a lengthy one, and it will be followed by what officials expect to be a record-breaking fireworks display. The speech is scheduled to begin at 9:45 p.m. EDT.

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The heat wave has sparked criticism from some local leaders. Maryland Governor Wes Moore, a Democrat, has slammed Trump for endangering lives by holding a July 4 rally in such extreme heat, arguing that public safety should take precedence over political spectacle. Moore's comments reflect broader concerns about the health risks posed by the heat dome, which has already caused multiple heat-related illnesses in the region.

Trump's speech comes amid a backdrop of heightened political tensions and international challenges. The president recently delivered a sharp Independence Day address at Mount Rushmore, where he blasted what he called the 'communist menace' and framed the holiday as a battle for American values. That speech set the stage for his National Mall appearance, which is expected to continue his combative tone.

The heat dome is not the only factor affecting holiday plans. The White House has also been managing fallout from Trump's recent clemency decisions, including pardons for emissions violators and consideration of celebrity cases, which have drawn criticism from environmental groups and ethics watchdogs. Additionally, Treasury Secretary Scott Bessent has dismissed concerns over Trump's involvement in cryptocurrency ventures that have generated over $1 billion in profits, a topic that continues to stir debate in financial circles.

Despite the heat, Trump has vowed to deliver a speech that will be "long" and memorable, signaling his intent to use the platform to rally supporters and attack political opponents. The address will be closely watched as a preview of his midterm messaging strategy, particularly as the Democratic Socialists of America gain traction and Trump has taken to branding Democrats as 'communists' to energize his base.

For now, the nation's capital is bracing for both the elements and the political fireworks. With the parade canceled and events delayed, the focus will shift to the National Mall, where Trump's speech and the ensuing display are expected to draw large crowds despite the heat.