Dr. Peter Venkman: Or you could accept the fact that this city is headed for a disaster of biblical proportions. Mayor: What do you mean, "biblical"? Dr Ray Stantz: What he means is Old Testament, Mr. Mayor, real wrath of God type stuff. Dr. Peter Venkman: Exactly. Dr Ray Stantz: Fire and brimstone coming down from the skies! Rivers and seas boiling! Dr. Egon Spengler: Forty years of darkness! Earthquakes, volcanoes... Winston Zeddemore: The dead rising from the grave! Dr. Peter Venkman: Human sacrifice, dogs and cats living together... mass hysteria! Mayor: Enough. I get the point.
The Ghostbusters explain to the Mayor in explicit terms what is about to happen to NY.