The fog closed in.
In addition to a thick fog, there was a heavy swell.
Fog has limited visibility to 100 meters.
I caught cold from exposure to the night fog.
As the sun rose, the fog disappeared.
I hope the fog will go away soon.
Due to the fog, traffic is temporarily suspended.
If you hit a patch of fog, slow down and put your blinkers on.
We had to stop over in San Francisco for two hours due to the fog.
Because of the fog, the airplane has been rerouted to Munich.
The fog won't clear until there's a wind to blow it away.
thick/dense/heavy/freezing fog The accident happened in thick fog.
... researchers lost in thick fog and led them miles...
God created Padania and, realizing the error, created the fog.