The fog soon blurred out the figure of a man walking in front of him.

It is dangerous to fly in this heavy fog.

Not a soul was to be seen because of a dense fog.

The freight train was held up about half an hour because of a dense fog.

The thick fog made it hard to see the road.

The heavy fog made it impossible for us to see anything in front of us.

Our plane couldn't land on account of the dense fog.

In addition to a thick fog, there was a heavy swell.

There was a thick fog around.

The flight was cancelled because of the thick fog.

Mr Smith lost his way in the dense fog.

It is dangerous to fly in this heavy fog.

Because of the heavy fog, we could barely see the road in front of us.

Because of the dense fog, nothing could be seen.

Because of the dense fog, nothing could be seen.

The flight was canceled because of the thick fog.