While millions of Americans across the Northeast experienced record-setting temperatures, thunderstorms in the Midwest downed trees, ruptured power lines and made transportation treacherous.

Thousands of people were at the National Mall on Saturday in the extreme heat, many waiting in lines for the Great American State Fair and the evening Salute to America.

DAYTON, Ohio (WDTN) – Despite the wide variety of Fourth of July events across the Miami Valley, one common thing you will see at nearly all of them is food trucks! However, amid a heat wave, those businesses are working hard to stay both cool and operational.

People waited in line for hours for the chance to get as close as possible to the Boston Pops Fourth of July performance on the Charles River Esplanade.

An extreme heat warning was in affect for the Fourth of July until 9 p.m., with thunderstorms expected to hit the city in the evening.

A heat wave is here as Fourth of July celebrations begin. Also in the news today: What to know about the Trump Accounts for children launching on July 4; and a jobs report shows hiring in the U.S. slowed down sharply.

Generations of families gathered in Conshohocken to celebrate the 75th running of its annual Soap Box Derby, a Fourth of July tradition that continues to bring racers year after year.