Overheating can be very costly. Kennewick drivers can literally melt down their engine and have to replace the whole thing. So don't ignore warning signs.
First turn off the air conditioner. This will lower engine temperature right away. Next, crank up your heater to maximum heat and run the fan at high speed. You might need to roll down the windows, but this will take a lot of heat off the engine. Pull over as soon as you can safely do so, especially if you are stuck in slow-moving traffic, and shut the car off. It may take as much as 45 minutes for the engine to cool to the point that it’s safe to operate the car again.
If you need to add water or antifreeze, be sure to wait until the car cools down. Opening the radiator cap or even the overflow bottle when the coolant is hot and under pressure may result in serious burns.
After the engine has cooled for 45 minutes or so, look to see if the coolant is low in the overflow tank. If so, you can cover the overflow tank cap with a large cloth and open the lid. Then start the engine and pour in some water or antifreeze. Pouring it in when the car is running will circulate the new, cool fluid with the warmer fluid in the engine and avoid engine damage.