Guess you've never heard of how many are employed building and maintaining ice roads so that the drill/production pads and pipelines can be set up in the winter ey Lill? Maintenance work happens in the summer while the bulk of the exploration/construction work happens in the frozen winter. Every year the season starts later and ends sooner because freeze up that allows for movement across the tundra happens later and the spring thaw that ends the season in happening earlier. This year more than likely much earlier.