I thought so too. Imagine changing engines in those conditions! Wonder if Air Canada has any support there.
Such aircraft could be retrieved and brought to another airport by company's test pilot. Yes, they can obtain a ferry permit and fly it out on a single engine (sufficiently empty of course). It is up to the airline how they want to handle it. I know United had test pilots for jobs like that - they would fly a crippled airliner sometimes across the globe.