Three storms

The three storms are three weather events occuring in the film.

Siberia Storm
The storm freezes everyone in sight. The storm then goes to Ulaanbaatar and then Beijing before going to Tokyo, causing giant hailstones the size of tennis balls to rain on the city. This storm freezes most of east Asia.

Scotland/Paris And London England Storm
The storm in Scotland freezes the fuel lines of 3 military helicopters going to airlift the royal family before killing everyone inside. The storm later kills professor Terry Rapson and his colleagues. The storm then heads down to Berlin, Warsaw and Chrisinau before going through Europe.

Canada Storm
This storm starts in Canada killing a photographer, it then goes to Ottawa and Toronto where it kills some more people. In then arrives in New York where it devastates Manhattan. Jack and Sam hall barely escape from this storm but others such as an NYPD officer and the group from the library aren't as lucky. The storm then heads down to Atlanta, Georgia and stops there.

Other extreme weather
A tornado outbreak devastates Los Angeles.