"“Escape From New York” may have had only one real New York shot in the entire movie, but all of “Escape from LA” was filmed in Los Angeles. The sequel was shot over a period of one hundred and three nights, and Carpenter said he found filming at night to be very “soul draining” as it changes the way you see things and the darkness infects you in a very unhealthy way."
January 1, 1970
https://en.wikiquote.org/wiki/Escape_from_L.A.