Some elements of the disaster depicted here reflect the Texas City Disaster: On 16 April 1947, a mid-morning fire on the SS Grandcamp, docked in Texas City, caused the ship to blow up and ignite several oil refineries around the harbor. The fire detonated approximately 2,300 tons of ammonium nitrate and the ensuing fires and explosions killed at least 581 people in and around Texas City. These events also triggered the first class action lawsuit against the United States government, on behalf of 8,485 dead and injured victims.
The opening credits show closeups of several buildings. They are the Royal Bank Plaza (Toronto), recognizable with its gold-bronze windows, Place Ville-Marie (Montreal), a cruciform skyscraper, and Complexe Desjardins (Montreal), a shopping mall and office building.