Bro,

What I did when my previous car overheated was to open the hood, place a towel on the radiator and pour water until I was comfortable opening the cap. Once the cap has been opened I topped up my radiator with distilled water. I did all of this without turning my engine off. The reason (per my mechanic and my other auto owning friends) is that I may risk further damage to the engine by immediately shutting it off when it overheats.

Thanks and God speed.