"Really long speech": Trump's July 4 show collides with extreme heat

President Trump's hours-long July Fourth extravaganza — live from a stage on the Monument lawn — coincides with dangerously high temps in Washington.

The big picture: A humid "heat dome" is setting up a high near 101°F on Independence Day, per the National Weather Service, with a 50% chance of showers and thunderstorms.

Extreme heat warnings are in effect Thursday and Friday leading into Independence Day.

What they're saying: Teasing what's scheduled as a 45-minute speech, the curtain raiser to a massive fireworks, Trump on Wednesday said: "It's going to be approximately 107 degrees out, and I'm gonna go, and I'm gonna make a really long speech."

Arms outstretched, Trump declared: "Just to show that I can do anything."

On the National Mall, security will dial up to presidential inauguration-levels. Guests will go through TSA-style security, the Secret Service has said, and only a small clear bag or clutch is allowed.

Coolers and folding chairs are on the prohibited items list, but blankets and strollers are allowed.

Here's the run of show, per Freedom 250:

1pm: Guest entry begins, between 14th and 17th Street.

1:15pm: Military flyovers will begin and run on the hour until sunset.

5pm: Opening programming starts.

7pm: Freedom 250 Salute to America program begins.

9:45pm: President Trump scheduled to speak.

10:30pm: Fireworks, going 40 minutes long, shooting off from the Mall and the Potomac River in a bid to set a Guinness World Record.

Between the lines: The start of the fireworks depends on how long Trump's speech runs, as we reported Tuesday, and whether there's a rain delay.

What to know: Organizers are urging crowds on the National Mall to drink water and seek shade breaks.

Water distribution stations will be on the Mall, along with refill points and water misting areas, organizers say.