There is a reference to Sharknado (2013), when a zombie is thrown out of the tornado and Warren says "Well they're not sharks."
In an interview Keith Allan (Murphy), stated that he had always wanted to know what he would look like with his head shaved, but that he wanted to wait to try it out until someone paid him to do it.
Warren refers to Citizen Z as a geek. A possible nod to The Walking Dead.
Kellita Smith had no idea what her line "Well, they ain't sharks" meant. She waited until after filming to ask someone who told her about Sharknado.