A mother and her child are forced to swim through shark-infested waters.

In Arkansas, two storm-chasers help warn people that a tornado is barrelling towards them, wreaking havoc on downtown Jonesboro and leaving a trail of destruction. In Idaho, a daredevil adventurer decides to swim beneath a frozen lake — but his helpless girlfriend watches on as the wild stunt goes horribly wrong. A pair of fishermen get caught in chaos when 40mph winds and lightning surround their boat. And in the Italian Alps, scary weather strands a father and his young daughter in their cable car.