Blood splashed from Dempsey getting splattered by a metal door during a cyclonic storm is shown frozen to the side of the door as if dripping down from above, not coming, as it should, from the side where Demsey was forcefully and fatally hit.
Once absolute zero (-459.67 degrees F) is attained, all gases and liquids turn into their solid states. In that most gases liquefy before hitting absolute zero (Carbon-Dioxide at -109.3 degrees F, Nitrogen at -209.9 degrees F, Oxygen at -368.77 degrees F), the Earth should be flooded by its liquefied atmosphere before turning solid once absolute zero is reached.
If it were even possible for earth's magnetic north and south poles to move to middle latitudes, it would not flip the earth's climate zones, as climate is governed by altitude and proximity to the poles via the tilt of the earth's axis which affords lower latitudes more direct sun rays. The arbitrary position of the magnetic north and south poles shifting to equatorial latitudes would have a dramatic effect on weather patterns, but would not cause polar regions to become tropical and equatorial regions to become frozen.
They are shown trying to find the magnetic orientation of the cave paint scrapings. This would be impossible without knowing the orientation the paint scrapes were originally in. The only tests that could have been run on the scrapings would be carbon dating to determine when the paint was created.
In subzero temperatures, the conduction from skin to metal is rapid and serious. Bare skin should never touch metal in these conditions as it would instantly freeze and bond. Gloves or mittens should always be worn, yet the men in the arctic scenes are frequently gloveless and touching metal without adverse effects.
While the head of INTERSCI is stuck in an elevator, a helicopter is hovering above the building waiting to pick him up. However, the indicators inside the building state that the outside temperature is negative 100+ degrees Celsius. At that temperature, the fuel in the engine would have long frozen.
The people who went out of the INTER SCI building should have been frozen solid since the temperatures were extremely low. Their suits were not enough to keep them warm and to insulate them from the extreme temperature.
When Miami is being evacuated heavy traffic is seen moving in both directions on the freeway. In an evacuation like this incoming lanes of traffic on the freeway would be closed and used for cars leaving the city. If the city is being evacuated no one would be allowed to enter the city anyway.
When the massive straight line winds bring a palm tree down the Volvo, the interior shot shows a potted Areca Palm tree (office plant) coming through the windshield and "pinning" the father inside the car.
The premise of this movie is that the earth's polarity is shifting 90 degrees. Since the earth is a sphere (more or less), this shift should make two new polar regions along the equator, one directly across from the other. Instead, it appears to have wrapped the entire equator with a band of ice.