Toronto is a cold place today, but if it was originally cold it could possibly affect a driver by causing them to be supper cold. But if it was a hot place, it could cause the driver to be cold. I'm not exactly sure the answer you were looking for but I believe this is a pretty good answer.
Since neither reptile could have swum great distances across salt water he inferred that they once lived on a single landmass that has since split apart.
