"I know. Sol. You told me before. A heat wave all year long. A greenhouse effect. Everything is burning up."
~ Detective Thorne
Indeed, throughout the movie it is made clear that a permanent heat wave is in place in New York City in 2022. This is but one more anecdote that gives the lie to the Conservative myth that climate change advocates in the 1970s were exclusively worried about a coming ice age and global warming was not yet "a thing."