In 'Duma Key', what injury causes the protagonist Edgar Freemantle to move to Florida?

In “Duma Key,” Edgar Freemantle loses his arm in a construction accident, prompting his move to Florida.

Edgar is a wealthy Minnesota building contractor whose truck is crushed by a crane at a worksite. He survives, but the accident costs him most of his right arm and leaves him with serious head injuries affecting his speech, vision, memory, and emotional control. His recovery is marked by anger, depression, and suicidal thoughts, while the strain contributes to the collapse of his marriage.

At the recommendation of his psychologist, Dr. Kamen, Edgar relocates south and rents a beach house on Duma Key, an island off the Florida coast. Kamen also encourages him to return to sketching, a childhood hobby. Edgar’s artwork soon becomes central to the novel, connecting his damaged memories and creative impulses to the island’s supernatural history.

The injury is sometimes confused with a car crash because Edgar later encounters other traumatic accidents in the story, and Stephen King’s earlier short story “Memory” also explores the same character’s accident and recovery. In the novel itself, however, the initiating event is specifically a worksite construction accident involving a crane.