When the survivors get to Cairo train station they look at the train departures board but the board is from an Italian train station as only Italian cities are listed (you can clearly read names such as Roma, Napoli, Siena, Livorno etc.).
When liquid water changes to water vapor, the dissolved minerals are left behind. Since snow is made directly from water vapor, there can be no salty snow. Blowing liquid water can freeze but it would not make snow.
where do you start? in high winds their clothes aren't moving,
in the middle of the 'desert' there are trees. when they jump off the train the tracks are covered in snow, next shot the line is clear.
all in all this is an atrocious film.