Food Safety Report: Firehouse Subs Rockwall Plaza, East Interstate 30, Rockwall, TX, USA 1 year ago • details 31 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Headache Suspected source: firehouse subs Onset: 4 to 12 hours Duration: One Week Sick: Me Additional information: Cuban Sandwich