Continuity: In the same shot, note the top of the twin towers are in the clouds - its not a real nice day in NYC. But later when they're on the dock, there's not a cloud to be seen.

Continuity: When Kit gets all the survivors onto the top of the cars, out of the water to keep them "high and dry", Ashley's parents are standing on top of a car next to each other. In one particular shot there's a large distance between them, but in the previous shot they're next to each other.

Continuity: When Sylvester Stallone is in the tunnel with the survivors, he tells everyone to climb on the cars to stay dry, if you watch the female writer in the film closely, she climbs on top of the car twice.

Continuity: In the wind tunnel scene, in one shot you can see Sylvester Stallone is facing the small hole; in the next shot he has his body side on.

Continuity: When the love interest (I forget her name) finally gets out of the tunnel by the blow-out thing, the water on the surface is all churned up, choppy, etc. Cut to a helicopter shot, where the water is a flat as a millpond.