Other mistake: Throughout the episode, including the very first shot, we see the sun is shining brighter and hotter than usual. This lends credibility to the theory that Superman's powers are responsible for increased solar activity. Later on in the episode it is revealed that the heatwave is being orchestrated by Lex Luthor, who is is heating an underground river to coincide with Superman using his powers. Lex does not however have any control of the weather, and no explanation is offered for why the weather conveniently 'played along' with his plan.
Lois & Clark: The New Adventures of Superman (1993)
Episode list - season 4
Starring: Teri Hatcher, Dean Cain, Lane Smith, K Callan
More mistakes in Lois & Clark: The New Adventures of Superman
Superman: But, when I save a life, in that instant, I know two things that most people will never figure out: Why I'm here, and how I can make a difference.
Trivia: Dean Cain's mom Sharon Thomas appears in three episodes of the show. "The Green, Green Glow of Home" as Maisie, "Season's Greedings" as the pretentious lady and in "Just Say Noah" as the nun who thanks Superman.
Honeymoon in Metropolis - S1-E11
Question: Why did Clark destroy the video tape?