Your radiator is what stops your engine from overheating. If there is something wrong with your radiator, then major problems can result. Not only can your car overheat, but the other parts of your vehicle can fail. You can look at the temperature gauge to tell whether the radiator needs to be repaired. If the temperature is always in the hot zone, then the problem may be caused by a failed radiator.
You may also notice white steam coming out of the hood. You should pull over and turn off your car if you notice this happening. You need to call a mechanic in Dallas, TX as soon as possible. You may be able to temporarily correct the problem by filling up the radiator with water. Additionally, there may be a visible coolant leak. It is typically a bright color and may have a sweet smell.