A turret fire makes loaded ammunition the immediate hazard

How would a turret crew distinguish the order to fire from a warning that the turret itself was on fire?

A warning would identify the fire's location, while the crew might still fire loaded guns to remove shells and charges before they cooked off.

Crews would call out the location of a fire rather than rely on the single word alone. Loaded ammunition can become the greatest immediate danger inside the turret. Firing the guns may be safer than leaving shells and propellant exposed to heat until they cook off. Emergency action can reverse normal instincts when a magazine system is threatened.