Continuity: In the scene where Jack is briefing the President, he draws a line on a map of the U.S. and tells the President to have everybody south of that line evacuated. The shape of the line changes between shots.

Visible crew/equipment: When Jack is in the library towards the end of the movie, he looks in a room and then the shot goes back to facing him. If you look very carefully, in the back of the hall you can see a person walk by. He is very hard to see.

Factual error: The football (soccer in the U.S.) match we see relatively early on in the film is said to be between Manchester United and Celtic, in Glasgow. However, the non-MU team isn't wearing Celtic's home strip as they should be if playing in Glasgow (it's actually Boca Juniors from Argentina, in a match played in 2002) and the stadium shown is actually Old Trafford, Man. U's home ground, as shown by the advertising billboards in the background.

Continuity: The first time we see the black bear cage, the sign (and the entire shot) is a reversed image. Twenty five minutes later, we see the black bear cage again and the sign is correct.

Factual error: The International Space Station is shown taking meteorological measurements and transmitting them to earth. First of all, there are HUNDREDS of weather satellites already in orbit for that purpose, the use of which does not require distracting astronauts from other duties. Second, the ISS does not have sophisticated earth-sensing equipment.

Factual error: When the International Space Station is shown, it's spinning. The space station doesn't spin. The centrifugal force would create gravity on all the outer sides of the space station - and make it impossible to dock other modules.

Continuity: Just before the huge wave hits the library, we see that Laura cuts her leg. She cuts it on the side of the top part of her leg. Later in the movie, when her trouser leg is pulled back to reveal the wound, it is now on the front of her lower leg.

Revealing: Very near the end of the movie, when the NOAA director is viewed in the helicopter as it approaches NYC, the image is reversed, verified by the David Clark logo on his headset being reversed. There are two different shots of this just a few seconds apart, and they are both reversed.

Factual error: NOAA headquarters is shown to be in downtown D.C, when in fact it is just outside of the District in Silver Spring, Maryland.

Continuity: When the tidal wave is hitting Manhattan, and the camera cuts to Laura walking behind the black woman and the cop, the woman panics and turns to her left to look at Laura, but in the following closeup she turned to her right to look and talk to Laura. (Slow-mo may be required.)

Other: None of the men in the movie grow any facial hair at all, even the ones stuck in the library in New York.

Revealing: In the scene where a newscaster is mentioning that two airplanes were caught up in the storm and crashed, they show footage of the AVIANCA (Colombian airline) Flight number 52, which crashed in New York on January 25th, 1990.