Continuity mistake: Near the start, when it cuts to a street in Japan, a large hailstone hits the policeman's car. When it hits, the wipers just brush it away and keep working, but in the following shot when the policeman looks back at his vehicle, the hailstone is still there and the wipers are no longer working. (00:10:45)
Factual error: When Jack is showing Professor Rapson projections of the world, with the coloured storms, he first shows a quick picture of Europe. Greece is not visible on this map, you may have to look carefully.
Other mistake: In the scene where the first storm appears, you see little windmills spin and trees affected by this wind. However, the hair of the old man walking out of his house (in the same shot) is undisturbed. (00:23:30)
Continuity mistake: When all the people are in the library sheltering from the cold, in the overhead shot of the guard (the one who told the homeless guy he can't enter the library with a dog), he is in front of Laura and then walks to his right with clothing/blankets in his hand, but in the next shot he is behind Laura and the black cop. (00:58:40)
Other mistake: A huge majority of the crew listed in the first half of the credits are French Canadians, their name spelled properly, accents and all. As seen in the UK, all the times "è" should have been written, it was replaced by a "Ø", for example HélØne and LafreniØre. Very noticeable when you know about it, and most probably caused by a sloppy conversion between two software, and no one proofchecking the credits before putting the movie out. Maybe fixed for home release.
Other mistake: At the end when Jack walks into the room where everyone is and shines his flashlight around, you see the nerd and the rich kid with the librarian in the background. Then you see a girl next to Sam's girlfriend. Where did she come from?
Suggested correction: She's the girl who was arguing with the man about which books could and couldn't be burned before the boy finds the section on law to burn.
Revealing mistake: When the tornadoes are hitting Los Angeles you hear a woman say,'Is anyone hurt?' The angle is high and you can see the Capitol Records building, the tornado and the helicopter. If you look very closely at the bottom right you see lots of cars on the road driving like mad and one of them drives under a large truck trailer, betraying that they are CG cars. (00:26:35)
Continuity mistake: When the wave is hitting the city, there is one bloke standing by the library who is watching the camera. Camera cuts to another view, and the bloke has disappeared. (00:48:45)
Continuity mistake: When the group of teenagers is viewing the destruction in Los Angeles, they are watching FOX 11. However, a few seconds later when one changes the channel to show the air traffic suspension, it is shown that they are watching FOX 5. (00:30:55)
Continuity mistake: When Sam and the others are walking in the rain toward the library, they are carrying backpacks or duffel bags, but when they reach the steps they are not carrying any extra baggage.
Suggested correction: The bags were slowing them down, so they probably just abandoned them in the street.
Continuity mistake: Sam smashes the window on the boat to get into the medical room. Glass is left in the frame, however. Camera does an instant cut and the glass has gone completely. (01:30:00)
Continuity mistake: At the beginning of the film, when Dennis Quaid is running from the cabin to help his friend, in the far shot, you can see him run onto the ice, but in the following shot, he is on the stairs. (00:04:30)
Other mistake: During the tornadoes in LA there is a large sign that slams into the news anchor. The speed and angle of the sign would throw the anchorman at least towards the van that it goes over. Even if his body did hit the ground with the sign flat on top of him, his body would have moved towards the van if not slid far beyond it.
Continuity mistake: When Sam and the other two students are on the big ship, Sam goes outside so that the wolves will chase him, locks the door, then climbs the ladder to a door where the students are. The black student is startled and turns around with a metal scoop to his right getting ready to sling it, but in the following shot the scoop is over his left shoulder. (01:34:20)
Other mistake: Towards the beginning of the movie, one of the characters starts the ignition on his truck. If you look carefully, he turns the key the wrong way.
Continuity mistake: When Sam, Laura and the black student enter J.D.'s hotel room, Laura asks, "You live here?" and J.D. looks at Laura then puts his coat down, but in the next shot his back is to her and is putting his coat down again. (00:40:50)
Continuity mistake: In the scene when Terry Rapson is looking at his grandson's drawing, Simon comes into the room and puts a cup of tea on the desk. In the first two shots you see that the cup is in the same position where the handle is facing exactly towards the camera, but in the third shot, it has changed position, and the handle is now pointing to the left. (00:49:25)
Factual error: The old Sky News logo is used in the film, as shown in a broadcast.
Factual error: When the Scottish scientist calls Hall, he tells him that the freezing temperature of fuel is -150° Fahrenheit. This isn't true, Jet A1, which is the type of fuel in such kind of choppers freezes at -52.6° Fahrenheit. The scientist says that he had to look it up, so he should have the correct figures and as this figure is quite important to estimate the temperature in the eye of the storm, he wouldn't mix it up.
Other mistake: Near the end of the movie, in New York, once the storm has cleared, ships seem to be pointing out of the ice at all angles. For a while before the water froze over, the ships would've had enough time to either level out or sink if they had been ruptured in some way. Also, there is no way they could be touching the floor of the harbour, seeing as how the water not only rose, but it was already deep enough for ships to pass without difficulty. (01:46:40)
