What action should be taken for a pregnant woman whose water has broken?

When a pregnant woman's water has broken, the appropriate response is to activate Protocol 24, which specifically addresses Pregnancy, Childbirth, and Miscarriage. This protocol is designed to guide the dispatcher in assessing and managing situations involving expectant mothers, especially in cases where delivery may be imminent or complications could arise.

In this scenario, the breaking of the water, or rupture of membranes, signals that the woman is likely in the early stages of labor. This situation necessitates urgent attention, as there are important factors to consider, such as the timing of contractions, the possibility of cord prolapse, and monitoring for any signs of distress in both the mother and the fetus. Protocol 24 offers a structured approach to handle these critical aspects.

The other options do not align with the situation. Protocols for overdose/poisoning, penetrating trauma, or headaches focus on very different medical emergencies and would not provide the relevant guidance needed for a woman experiencing labor. Thus, Protocol 24 is the most appropriate choice for properly addressing the needs of a pregnant woman whose water has broken.