Disaster movies and action movies can be big business at the box office, so it only made sense someone would combine the two ideas into one high-concept package. That someone was screenwriter Graham Yost who, back in the 90s, was riding the gravy train of his successes with Speed and Broken Arrow. So taking his script, casting then popular Christina Slater, who starred in Broken Arrow, and bringing in Morgan Freeman fresh off the hit Se7en seemed like a slam dunk.