Police are advising drivers to avoid the M25 until mid-afternoon after a lorry fire closed the carriageway on both directions in Hertfordshire.
The section between junctions 21a and 23 near the South Mimms services is expected to be closed until 3pm.
Long tailbacks have built up on surrounding roads.
More top news
It will be dry and sunny for most over the next few days - but that won't help the temperatures.
A rescued bull terrier was found to have more than 50 shot gun pellets and the crown from a tooth embedded in his face.
A dry night with clear skies will leave to frost and fog patches overnight.