Peggy is a supply teacher, which means she wouldn't have keys to the school, so Bobby and Joseph couldn't get into all those rooms.
Tagline: "Pretty yare, huh? (wood cracks) Ahhhhh!" -Dale
In this particular episode, the site of Tom Landry Middle School is chosen for a shelter in the midst of the flood because, as it is stated in the episode, the school is on high ground. However in a preceding episode entitled "Love Hurts and So Does Art" (S3:E18) Bobby is shown having to first climb a steep street on his scooter (on account of his case of gout) and then having to roll down a hill to make it to the middle school (in order to dance with Connie). It is clearly shown that the school is located in somewhat of a ditch or valley, making it less than a prime site to be in a flood, had the analyzed episode stayed true to earlier seasons.
When Hank tries to get to Tom Landry Middle School, the flood is moving smoothly. But when he backs up to get on higher ground, the flood is now flowing rapidly.
Boomhauer does not have any lines in this episode.
Joseph: Hey, let's go to the girls' locker room and stand where naked girls have stood!
Dale: Do you have any loose floorboards I could scavenge for my gangplank? Joseph's been looking a little mutinous lately.
Hank: They say one of the problems in a shelter is that people often get shelter shock. They become dependent and childlike. We don't have a lot of room for error with Bobby.
Luanne: Did Uncle Hank order a duck? Because there's one in the mailbox.
Everett: In other words... (starts clucking like a chicken)
Woman: (Holds out a coat) Oh, and is this yours? Hank Oh, yeah, thanks! (She throws it into a puddle) Woman: Flooder! (Hank sighs)
Dale: Wow the Armageddon's so beautiful. It smells fresh.
Hank (putting Ladybird in a kennel during the storm): Remember Ladybird, the other dogs will be looking to you for leadership, be strong.
(Referring to the lightning)
Luanne: It's like God took our picture... before he kills us.
Hank: The phone was ringing. The red phone!
Man: Oh, and who was on the other end, Commissioner Gordon?
Commissioner Gordon is a character in the Batman comics. In the Adam West version of the show a red phone would ring when Gordon needed to get a hold of Batman to warn him of a crime.
Bill's comment about "not seeking the hard hat but having it thrust upon him" is an allusion to the famous lines from William Shakespeare's classic play 'Twelfth Night' in which one of the characters states "Be not afraid of greatness: some are born great, some achieve greatness and some have greatness thrust upon them."(Act II, Scene V).
The title comes from the famous quote by France's Louis XIV: "Apres moi, le deluge (After me, the flood)."
This episode seems to be very similar to George Orwell's classic fable, "Animal Farm," and its take on power. In the book Napoleon, the leader of the pigs, becomes drunk with power, and later turns on one of his inner circle, Snowball, casting him as the villain. Soon everything that goes wrong on the farm is Snowball's fault. In the episode Bill gets more and more Napoleonic, even imprisioning Hank, and blaming Hank for all the problems, including the missing sticky buns. 'Animal Farm' in turn took its cues from the way that Stalin turned on Trotsky, blaming many of Russia's later woes on a man he drove out and hunted down.