Driving conditions will be difficult with journeys likely to take longer than usual whilst some delays to air travel are possible.
Merseyside has been issued a yellow severe weather warning for fog on Wednesday.
Spectacular foggy scenes across Merseyside
Visibility across Merseyside today was dramatically reduced as thick fog was present over the region all day.
Temperatures dipped to -4 last night and this morning there was still a cold feel in the air as the fog rolled in across the Mersey.
Merseyside’s National Police Air Service helicopter took a recent flight over Wirral and Liverpool during thick fog.
Fog brought a spooky start to Halloween this morning on Merseyside and the Met Office has warned the foggy mornings could get worse tomorrow.
Thick fog caused travel disruption this morning. Look through the best pics & vids here.
The Met Office warns that Merseyside is expected to have a 3rd day of thick fog and that more travel disruption could be expected on Tuesday morning.
Ferries suspended and flights cancelled due to thick fog. Read the latest here.