Fire and emergency egress
Blocked exits, propped-open fire doors used as stock overflow, extinguishers present but unserviced, no one knowing the assembly point. The hazard on this row isn't really the fire — it's not getting out. You can't prevent every ignition in a kitchen full of oil, gas and electrics, so the control that actually saves people is a clear, known way out. That's why a blocked exit or a propped-open fire door is the real risk here: it turns a manageable fire into a trapped one.
This is one hazard. Your register is the set that applies to you — under 20 questions, about five minutes, free.