1993 Mitsubishi Galant squealing noise

1993 Mitsubishi Galant mileage: 199,500. My car has recently started making a squealing noise when I start it up. It has gotten even worse through this cold spell that we had recently; but after the car warms up the noise stops. I've been told that it is just the fan belts, which sounds right, but I still don't know what to do. My question is: Is there anything that I can do or do I need to invest in new belts?