What is the most logical next event?

How to cool an overheated engine
Avoid panicking and pull over as soon as you can.
An overheating engine, while serious, will not cause you immediate harm. If your temperature gauge hits the red or you notice steam coming from your engine, slow down and pull over as soon as you find somewhere safe.
If you notice white clouds coming from your engine, it is not smoke but steam that is coming off an overheated engine, and you have some time to pull over. If you cannot immediately pull over, you should : Turn off the ac and open the windows.