Final answer:
In the scenario presented, the correct action is to call for medical assistance immediately due to the signs of potential hypothermia and severe illness in the elderly woman. Additional comfort measures should be secondary to rapid professional intervention.
Step-by-step explanation:
When encountering an elderly individual showing signs of potential hypothermia, weakness, and an inability to respond, the appropriate course of action is to call for medical assistance immediately. This situation suggests that the individual may be suffering from serious illness or exposure to the cold, and urgent medical care is necessary. While offering a warm meal and extra blankets may seem helpful, they are not an adequate response given the severity of the signs presented. Moreover, simply turning up a space heater may not be safe or effective, and could potentially pose a fire hazard if not monitored carefully.
Considering that body heat regulation can be particularly challenging for the elderly, rapid medical intervention is crucial. It's important to stay with the person, providing comfort and reassurance while waiting for emergency services to arrive, and to avoid unnecessary movements that could worsen their condition.