The Towering Inferno (1974)
So here it is, the film that is arguably the major classic of the disaster movie genre. Certainly, The Towering Inferno is the finest example of the 70’s style of disaster cinema: big all-star cast, multiple storylines, a spectacular central event, and an all-around massive production (Inferno was at the time the biggest film produced on the 20th Century Fox lot by virtue of its 57 sets and four camera crews.)