An emergency action plan (EAP) is the document that says what people at a workplace do when something goes wrong: a fire, a chemical release, a severe storm, a violent incident.
It covers the first minutes. How an emergency gets reported, how people leave, where they go, and how you confirm everyone is out. It names who does what, so nobody is working it out during the event.
OSHA sets a minimum list of elements for the plan in 29 CFR 1910.38. Your site's hazards decide what goes on top of that list.
An EAP is not a fire prevention plan. Fire prevention (housekeeping, ignition sources, fire hazards) is covered separately in 29 CFR 1910.39.
People are alerted through an employee alarm system that meets 29 CFR 1910.165.
Exit routes are governed separately in 29 CFR 1910.34 to 1910.37. The current official text governs.

