Reina Del Agua translates from Spanish to English as The Queen of Water
Ray McKinnon (John Proctor) appeared in Deadwood which starred Kim Dickens (Madison Clark) and Dayton Callie (Jeremiah Otto). All three actors appear in this episode.
Madison says "fuck" in this episode, one of the two instances where AMC allowed the word to be used in each season. (They would relax that policy in years to come.)
This is the last time we see the original Fear the Walking Dead (2015) melting logo. It was completely revamped under the new showrunners in Season 4.
The scenes of Madison floating in the aftermath of the dam collapse were shot in a giant water tank.