THE MET Office is warning that widespread fog could cause travel disruption in Essex tonight and tomorrow morning.
Some parts of the county will not see the fog, but where it does form it could cause visibility problems.
It has given Essex – including Southend and Thurrock – a "yellow warning" from tonight.
The office's chief forecaster said: “The public should be aware of the potential for difficult driving conditions and some travel disruption.
“Fog patches will affect some parts of the yellow area as early as Monday evening. However, there is potential for fog to become more widespread overnight and into Tuesday morning. Some places within the yellow area will not see fog, but where it forms it could be locally dense with visibility falling below 200 metres.
“The fog may be slow to clear on Tuesday in some places, especially across the east of the warning area.”
A yellow warning is the lowest level of caution issued for severe weather possibilities, meaning the agency wants people to "be aware" of the risk.