In Edgar Allan Poe's "The Cask of Amontillado," several significant events and hints foreshadow Fortunato's tragic demise.
How to explain
The narrative begins with Montresor's concealed revenge plot against Fortunato, exploiting his pride as a connoisseur of wine by luring him to the catacombs to taste a rare Amontillado.
Montresor manipulates Fortunato's vanity, exploiting his excessive consumption of alcohol, making him vulnerable. As they descend into the catacombs, Fortunato's intoxication increases, and subtle hints of danger emerge, including the ominous atmosphere, Fortunato's coughing, and Montresor's mentioning of the family coat of arms.
These elements cumulatively lead to Fortunato's entrapment and subsequent death by immurement.