MetLife Stadium is hosting two semifinal games, and the champions will be crowned after the final match on Sunday.
The National Weather Service put Bergen County under a heat advisory until 8:00 p.m. Tuesday.
Eyewitness News spoke with fans who toughed the sweltering heat to support their teams.
"Hats, glasses, water in a bag, sunscreen, and a whole lot of fluids," Alex Lukovic suggested to his fellow fans.
"We'll be down in the concourse in a little bit, probably at halftime ... to try and protect from the heat," James Farthing shared his plan to take a break from the stands. "Should be a good game."
"It is a little tough because it's humid, it's not dry, but we can deal with it," Mitz Desouza explained.
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