As a worst-case scenario played out in Superior on Thursday, it was met with a coordinated response. An explosion and fire at the Husky Energy refinery, followed by a second bigger fire, led to a state of emergency and the evacuation of much of the city. But no one died. Fewer than two dozen were injured. And the fire was contained. "I think it's important to note that, while yesterday was a very scary day, it had the potential to be absolutely catastrophic," Superior Mayor Jim Paine told a crowd of reporters Friday morning.