When was the last time you changed your radiator cap? Overtime, its valve gets stuck up which prevents water from going back to the radiator. The engine's cooling system is quite complicated as every component almost reacts with each other. Things you need to consider checking: Radiator cap, Thermostat Valve, Thermostat switch, Radiator hoses (check if they're collapsed already) and the Radiator fans (as Dr. D mentioned).