It is believed that the man, who has not been named, had to be cut free from his car, which he relied on for warmth and shelter, by firefighters on Friday at 10am.
The Met Office has predicted that temperatures could plummet to perhaps as low as -10C in parts of Scotland overnight, with sub-zero conditions widespread elsewhere.
Cumbria s emergency services are engaged in a multi-agency response as heavy snow wreaks havoc on their road service - with vehicles stuck in the south of the Lake District.
Events such as Christmas lights switch-ons, firework displays, dozens of official parkruns and children s football matches have been cancelled across the UK.