hi guys.

Lately, but not so often when my car is idling say at a light I hear this noise similiar to when the power steering belt starts to whine or something.

I heard it again this morning after driving home from a cold start.
Temp outside was probably 25 degrees. I started up my car waited like 30 seconds then drove off.
I got to the traffic light and I could hear like a faint whine...

Is that an indication that the belts need to be tightened, replaced or could it escalate to a more serious problem?