If, when you hear the words "New York City," you tend to think "apocalyptic cesspool" instead of "greatest city in the world," congrats: cockroaches are proving you right, because they're maybe about to start flying around the city because that's what they do when it's this hot and humid.

“In hot steam tunnels, something with the temperature and the humidity encourages them to fly,” said Ken Schumann, an entomologist at Bell Environmental Services, to the website DNAinfo. “When it's warm and steamy that seems to be what they like."