The first time Thomas and Denning get out of the car, the cable for the roller light goes out the car's window, but when they get back in, the cable has been moved to out the door instead of through the window.
The fire trucks in the film change from older brands that are now out of business to present day current brands.
A refinery worker is shown falling to his death with a night sky in shot, but the scene is in the daytime. It's clearly inserted from another film.
When Catches On Fire From Having The Explosive Device Detonating, The Fire Protective Gel Can Be Seen On The Stuntman's Head.
The address for the house fire is given as "1313 Mockingbird Lane" (which is actually the home address of The Munsters), but there is a large "16" on the front door,
Near the beginning of the movie, there's indication this takes place in Pennsylvania. However, later on one of the firetrucks has a California license plate.