Having your car's cooling system and radiator in good working order is vital for keeping your car from overheating. The cooling system includes the liquid coolant that is run through your engine's components to prevent them from generating and expelling too much heat. The radiator helps clear the heat out of the engine.
One of the reasons why your car could overheat or the warning light for your coolant might come on is that there is a crack and leak somewhere in the system. The coolant also just needs to be cleared out or naturally runs low over time. Driving without coolant can be dangerous, especially if you also run the air conditioner. Pay attention to whether your temperature gauge appears to be functioning properly.
You should not neglect to have your car's cooling system and radiator inspected right after the car has overheated or a warning light has come on.