Edit fog density at runtime?

I have this actor that spawns a Local Sphere Fog (though it is called Local Height fog) and I want to be able to edit the property “Fog Density” under the category “Fog Distribution”. Getting the return value from the selected actor only allows me to Get Fog Density, not set it. The same thing happens when it is a part of the Blueprint that spawns it (I.E. a component of the Blueprint).

I want to know if it is possible to Set Fog Density at runtime or otherwise in a Blueprint, or if there are alternative methods for making a Local Sphere Fog actor fade-out.

Thank you!