I used to live in fog. It was called marriage. Now that the state of matrimonial slavery is behind, I can appreciate the physical fog of the Bay Area, and wish I was living there again.
Heat dissipates fog, as can a fresh wind off the ocean, but the fog in the mind only gets worse as we age. So far that fog is at a minimum, and I see through it most days.
Fog can also be generated by human beings when they get elected, so we have to be aware.