Clouds can be as high as 15 kms above sea level. Fog is a kind of cloud which touches the ground. I still remember the “fog” bowl Grey Cup game of 1962. The final part of the game had to be played the next day and I went with friends to see it.
It would have been difficult to play football in today’s fog at Humber bay.
The fog comes
on little cat feet.
It sits looking
over harbor and city
on silent haunches
and then moves on. – Carl Sandburg