That night as they slept, the train rushed across the top of Lake Superior, through the great forests and southward towards Toronto.

There is less ice on Lake Superior during the winter, and consequently the water absorbs more heat.

That night, they slept as the train rushed through the night across the top of Lake Superior, through the forests and southward toward Toronto.

A ship sinks during an autumn blizzard on Lake Superior, and Cass and his dog are the only ones who can help the survivors.

However, as warming water closes the gap, as in Lake Superior's case, the atmosphere gets more turbulent.