If the weather is meant to be a deterrent, the president says it is not working.

The vow

Speaking in Medora, North Dakota, at the opening of the Theodore Roosevelt Presidential Library on Tuesday, Trump previewed his Independence Day plans, The Hill reported. "On July 4, it's going to be approximately 107 degrees out," he said. "And I'm gonna go, and I'm gonna make a really long speech, just to show I can do anything." The line contained no policy — just the image of a president planted on the National Mall in a heat wave.

What's planned

The July 4 event, "Salute to America," is organized by Freedom 250, the White House-backed group coordinating the nation's semiquincentennial, and is anchored at the Washington Monument grounds, according to Freedom 250. Gates open in the early afternoon for a daytime program of music and military flyovers, with an evening broadcast and the president's remarks scheduled for the night. The finale is a 40-minute fireworks display — organizers say some 850,000 shells from ten sites along the Potomac and the Reflecting Pool, pitched as a record attempt.

The heat

The National Weather Service has warned of dangerous heat over the holiday, with a July 4 high near 102 degrees in Washington and a heat index that could reach about 107 in the afternoon, WTOP reported — part of a dome affecting tens of millions of Americans. Forecasters and physicians urged crowds to hydrate, seek shade and watch for signs of heat illness. The District plans to run cooling centers over the weekend, and organizers are advising attendees to bring water and prepare for long security lines.

The backdrop

The celebration is the centerpiece of America's 250th-anniversary events, with Washington as the symbolic focal point. Whether the president's speech runs long or short, the setting — a sweltering capital, a record-chasing fireworks show and a country marking a quarter-millennium — will be hard to miss.