Loudoun Fair president John Smith says crowds have been strong all week, especially after work, when it's a little cooler and the rides are open.
Smith also runs his own farm and says corn and soybean crops are suffering from the heat as well.
"South of here is in bad shape," he says. "And also north of here in Pennsylvania has been hit really bad as well.”
Visitors to the fair have to be fed, and that means somebody is usually cooking.
Vincent Brice cooks for a vendor that travels up and down the east coast all summer, and he says there's nothing like cooking outside in 100 degree weather.
"It feels like I'm in a deep fryer, constantly sweating," says Brice. "We have a fan going but it's just hot, steamy hot."
Luckily for Brice, this is the last day of the fair. The event closes down tonight at 11 p.m.
The new rules create a long-awaited regulatory framework for what has become a popular and industry made up of over 150 food trucks.
Thirteen first-time Democratic candidates said yesterday that they hoped to unseat Northern Virginia Republicans as part of a plan to get closer to a majority in the House of Delegates.