The Met Office has issued a yellow be aware fog warning for tomorrow, covering Brighton, Hove and Sussex.
It says: "Fog patches are expected to form overnight onwards into early Thursday morning, becoming dense in places with visibility below 200 metres at times.
"The public should be aware of the potential for some difficult driving conditions and disruption to travel, particularly during the morning rush hour."
It's chief forecaster adds: "Light winds and clear skies overnight and during Thursday morning will allow fog to form in places.
"Not everywhere in the yellow area will see fog, but where it forms it is likely to be dense at times, especially in low-lying areas.
"The fog will then slowly clear through the middle of the morning."
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