How hot is it going to be in D.C. on the Fourth of July?

There’s good news for D.C.’s epic annual Fourth of July fireworks show: Accuweather is predicting that no thunderstorms are expected to delay or postpone the fireworks over the National Mall. The bad news is that this long heat wave is expected to continue unabated in D.C. on the holiday. The Capital Weather Gang expects July 4 to be a “sultry summer day” with highs over 90 and very high humidity.

Meanwhile, traffic this week sounds very intense in the Washington area as everyone gets out of town for the holiday. AAA Mid-Atlantic expects 1.2 million people from the D.C. metro area will travel at least 50 miles for this holiday, and many people plan to travel today or tomorrow. The worst traffic is anticipated on Tuesday, AAA spokesman John Townsend told WTOP, saying “on Tuesday, on virtually every single road, you’re going to see ungodly and unworldly traffic delays.”

• D.C.-area forecast: It’s the hottest day of this heat wave, but it will stay steamy through Friday [WaPo]
• ‘Ungodly’ traffic delays expected this week [WTOP]
• July 4th fireworks: Where will the weather be best for the spectacular shows? [Accuweather]