If you know this, disregard, but heat lightning is just lightning off in the distance. It’s still a thunderstorm...you just can’t hear the thunder because its so far away. It has nothing to do with heat. It gets its name because you see the flash and its usually clear where you are and hot....but where the lightning is...you can bet there is thunder and rain (unless its in the desert and its evaporating).
I was not aware of the “mechanics” the details of “heat” lightning.
The lightning continued to be visible for another two hours last night, providing quite a “show”.
Thanks.