National Geographic: Much of the oil flow shut down by the destructive wildfires in Fort McMurray, Canada, was destined for the United States, and it's uncertain what effects the slash in oil shipments might have for an American market that has come to depend on imports from Canada.
Above average temperatures and unusually dry conditions have been cited as factors in the runaway blaze, which so far has burned approximately 400,000 acres (625 square miles), destroying thousands of homes and buildings. Colder, wetter...