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Overnight temperatures just don’t cool off as it should,” Pope said. “If you’re a more suburban or rural area, where the heat is free to radiate and cool off. It doesn’t do that as fast in the city, so it just seems hotter longer.

But more work has been focused on restoring Newark’s tree canopy. Trees and plants are critical to combatting the urban heat island effect, Pope said, because they provide shade, absorb sunlight and emit moisture to the area around them.

[A] study we did back in the 2000s was driving from Newark out to suburban New Jersey, up toward Verona and Caldwell,” Pope said, referring to more suburban communities just a few minutes northwest of Newark. “It just classically cooled off the more suburban you got away from the urban core.