Mary Blake est une jeune chanteuse cherchant désespérément du travail à San Francisco. Le gérant de casino Blackie Norton lui fait signer un contrat qu'elle regrette lorsqu'elle se voit offrir une place à l'Opéra Tivoli. Après une dispute avec Norton, elle rejoint la maison Tivoli de Jack Burley. Blackie menace de poursuivre Burley en justice, demande à Mary de l'épouser et arrive à la convaincre de revenir travailler pour lui. L'idylle ne dure pas et Mary le quitte à nouveau pour l'Opéra Tivoli où elle devient la tête d'affiche. Alors que sa carrière est à son apogée, un tremblement de terre frappe San Francisco et la ville n'est plus qu'un champ de ruines.
Airline pilot Jack Gordon (Fred MacMurray) on a flight from New York to San Francisco, is immediately attracted to beautiful passenger Felice Rollins (Joan Bennett). Known as a "lady's man", he betting stewardess Vi Johnson (Ruth Donnelly) that he will take Felice out to dinner that evening. A jewel robbery is in the news and a beautiful blonde is implicated, with Jack suspecting that Felice may be the culprit. On a stop over in Chicago, Jack learns instead that his passenger is a wealthy socialite at odds with another passenger, Count Stephani (Fred Keating). Jack worries that he may have a crisis involving the Count when he finds Stephani has a gun aboard. Other passengers include Dr. Evarts (Brian Donlevy) and Curtis Palmer (Alan Baxter, both of whom seem to be harboring a secret.
Une série de catastrophes naturelles frappe le monde. Les éléments se déchaînent, les grandes métropoles comme New-York se retrouvent détruites sous le coup d’énormes séismes, ou englouties sous les raz-de-marées. Au lendemain du désastre, une poignée de survivants tente tant bien que mal de survivre. Martin, séparé de sa famille qu’il croit disparue, tombe éperdument amoureux de Claire, une jeune femme en proie à une bande de malfrats qui tente de la kidnapper…
Terry O'Neil (Charles Ray) is the youngest of a group of Irish-American firefighting brothers. He courts Helen Corwin (May McAvoy), the daughter of a politician whose crooked building contracts resulted in devastating blazes.
Une jeune femme, Miss Dorothy Gibson, relate à ses parents et à son fiancé, un marin, son aventure à bord du Titanic lors de son naufrage. Le naufrage est représenté au travers de flashbacks, de façon très romancée. Finalement, son père accepte son mariage.
Vulcanologist Peter Slater Dan Cortese, studying elevated steam-activity on Angel Mountain, finds evidence of an impending eruption such as many animals lying dead for no apparent reason. His ex-girlfriend Kelly Adams, a resident of the eponymous town, is told about his findings—which unfortunately, happen to be during the peak tourist season. Kelly tries in vain to warn the townsfolk and council of the danger, but they fail to heed and evacuate—until the mountain shows ashfall. After several attempts to find a solution, Peter declares that the lava is soon going to come down like "a liquid avalanche" which gives Kelly the idea (due to Angel Mountain and some others nearby being snowcapped) of using a snow avalanche to stop the lava flow—at which Peter balks, until Kelly tells him of the lack of other albernatives. The two then set out skiing to planting explosives to set off a controlled avalanche to stop the flow—but in attempting to escape the resulting avalanche Peter gets buried and Kelly makes it into town to witness the result, the snow avalanche blocking off (and solidifying) the lava-flow. At that point, Peter manages to dig himself out and return to town, after which he and Kelly rekindle their romance.