Factual error: The minivan that Ray drives is shown several times with its rear-most side window rolled all the way down. No such ability exists on any year/model of Chrysler-built minivan. They are either fixed (non-opening) or hinged at their forward edge to open like a 'flap' at the rear edge. The glass isn't broken, as it appears/reappears depending on the scene, and no such customization is possible as such a large window has no place to go down to due to the wheel well location directly below. The windows were obviously removed so the camera could move through the glass without having to use digital effects to go through the window, but in doing so, they created an obvious mistake.
Factual error: When Robbie runs up the hill to watch the army attacking the tripods, Rachel is left standing by a tree and a squadron of AH-1 gunships flies overhead to attack the aliens. However, these helicopters don't have any landing struts (certainly the one nearest the camera doesn't), but all models of the AH-1 had fixed struts.
Factual error: As the Hudson-Athens ferry capsizes, Tom Cruise and his two children are almost crushed as a car slides off the ferry and quickly sinks, going straight to the bottom. We see that this sedan-style car has people in it, and that the windows are closed, so the passenger compartment has not yet flooded. It is still full of air. A sedan full of air would not quickly sink. It would briefly float on the surface, then slowly submerge as the passenger compartment floods.
Add timeBruce Trestrail
Factual error: The New York Central Railroad's West Shore Line train tracks depicted in the scene with the burning train in Athens NY is not accurate. Tom Cruise and the children walk right onto the ferry terminal after crossing the train tracks, but in reality the tracks are over two miles to the west of the Hudson River shoreline.