The slip-road at junction 36 (Kirkby Lonsdale) on the M6 northbound is blocked, due to an accident.
Sizzling temperatures have brought warnings about the dangers of diving into rivers or swimming in lakes in Cumbria.
A 21-year-old man from Essex died on Sunday after being rescued from Coniston Water.
Since the heatwave began this week, youngsters have been diving 30 feet from the Devil's Bridge in Kirkby Lonsdale.
It is a craze called tombstoning and last year 22-year-old Darrell Teale from Greater Manchester died after jumping from the same bridge.
Sergeant John Stephens says that Cumbria Police is working to prevent such accidents happening again:
His Royal Highness the Prince of Wales has been pouring himself a pint of beer at one of the market stalls in Kirkby Lonsdale.
His Royal Highness the Prince of Wales is visiting Cumbria today.
Prince Charles will be visiting the historic market town of Kirkby Lonsdale where he will tour the market and local shops, before meeting stall holders, shopkeepers and locals.
He will also pay a visit to St Mary's Church in the town, which dates back to the 12th century.
Cumbria police have confirmed the name of the man who died after jumping into the River Lune as 22 year old Darrell Teal from Manchester.
Police were called to the incident in Kirkby Lonsdale after reports that a man had failed to resurface after jumping off the town's Devils Bridge.
The fire and rescue service, local mountain rescue team and specialists from the underwater police diving unit were at the scene.
Mr Teal's body was found just before midnight a short distance downstream from the bridge.
There are no suspicious circumstances surrounding the death.
The inquest into the death of a man in the River Lune at Kirkby Lonsdale is due to get underway today. The 22 year old from the Manchester area died after eye-witnesses saw him jumping into the river from The Devil's Bridge. A post-mortem will also be conducted into how he died.
A man has died in the River Lune at Kirkby Lonsdale in south Cumbria.Read the full story ›
A 22 year old man has died in the River Lune at Kirkby Lonsdale. He was reported missing at 5pm yesterday. Witnesses say he jumped from a bridge into the river and didn't resurface. Divers joined a search involving police, fire officers and mountain rescue. His body was found several hours later.