While your best bet is to get help from a mechanic, your safest bet is to be prepared.

If your car overheats, follow these simple steps:

• Do Not Drive More Than a Quarter Mile
• Have it Towed
  This will avoid further damage to the engine.
• Pull Over to a Safe Location
  Once in a safe location, turn off the engine.
• Do Not Open the Hood
  Wait until the car has completely cooled or the temperature gauge has moved from hot to cool.
• Check the Coolant
  Look in the owner’s manual if you are unsure where the coolant reservoir tank is.
• Make Sure the Radiator Cap is Cool Before Opening it
  Slowly twist it off with a towel and beware of any hot steam. If needed, fill coolant to the top of the radiator. Put the radiator cap back on.
• Check the Upper or Lower Radiator Hose
  Make sure none of the radiator or heater hoses have not been blocked, disconnected or burst.
• Restart the Engine
• Carefully Monitor the Temperature Gauge
  If you see it crossing the optimal mark again, pull over to a safe location and turn the engine off.

Store these essential items in your car:

• Coolant
• Tool kit
• Working flashlight
• Non-perishable foods
• Water