Final answer:
The home health aide should call for emergency help immediately if a client experiences intense chest pain, radiating arm pain, and profuse sweating, as these are signs of a possible heart attack.
Step-by-step explanation:
If a client complains of intense pain in the chest that radiates down the arm and is accompanied by profuse sweating, the home health aide should call for emergency help immediately. These symptoms are indicative of angina pectoris or even a more severe condition like an acute myocardial infarction (heart attack), especially when they include referred pain down the arm and diaphoresis. Time is critical in these situations, and medical professionals must assess and manage the condition as soon as possible.