Emergency services are tackling a fire at a gas conversion garage in Darlington.
There are also reports of explosion at the building on Cleveland industrial estate in the Albert Hill area.
The air ambulance is taking one casualty to Newcastle's RVI.
He's believed to have arm and head injuries.
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White Rose flags and crowds half a dozen deep met the riders as they swept through the towns and villages of North Yorkshire.
The Black Cats boss has spoken to the media following his side's one nil defeat to Bournemouth which relegated them from the Premier League.
The Black Cats will play next season in the Championship after being relegated from the Premier League.