Food Safety Report: Firehouse Subs - Covington, LA, Park Place, Covington, LA, USA 5 months ago • details 23 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Stomach Pain, Chills, Headache Suspected source: Firehouse subs Onset: 12 to 24 hours Duration: Several days Sick: Me