Jay Slater's desperate family treks 2,000ft 'badlands' ravine in search of British teenager as they plead for end to 'living nightmare'

That was the last time anyone heard from him and around 9 a.m. a missing person's report was filed, sparking a massive rescue operation.

Debbie Duncan, Jay's devastated mother, who flew out Tuesday, sobbed as she pleaded for help to find her missing son.

She told ITN in an emotional interview on Wednesday: “It's just a real living nightmare. It's like a dream – it's like nothing is happening.

“I wouldn't wish this on anyone. I just want my baby back. Please, anyone who can help me, look for it.”

On Saturday, Jay's father Warren Slater, in tears, said: “I just want my boy back” as he overlooks the search area with his other son Zak.

It was revealed on Friday that the Lancashire teenager was last seen by the owner of the Airbnb where he stayed on Sunday evening.

Ophelia, the owner of the Casa Abuela Tina vacation rental, said she saw him “walking fast” into a dangerous ravine in the vast mountainous area near Masca.

Rescue efforts focused Friday on an area known by locals as the “badlands,” running down a 2,000-foot ravine in remote Teno Park.

Residents and experts have warned of perilous conditions in the area: where the air is “thin,” temperatures change rapidly and mountains drop abruptly to the water below.

As the search enters its seventh day today, temperatures are expected to reach 29 degrees.

The UV index is also at “extreme”, with a figure of 11 and 12 peaking around 1 p.m. – anything above 11 is classified as extreme and dangerous.

On Friday, Lancashire Police offered to help Spain's Guardia Civil in their efforts to find the teenager.

But Tenerife police rejected the offer and insisted they had the “resources” needed to find him.

Jay's mother Debbie later criticized the investigation into her son's disappearance for not allowing British cops to contribute.

The mother also told the Guardian she spent eight hours in a police station as they revealed plans to step up rescue efforts.

Two new pieces of information came to light on Saturday, including a possible sighting of Jay following his disappearance.

Debbie told Mail Online that a witness went to the police and claimed to have seen Jay sitting on a bench with the two men 3.5 miles from his last known location in Santiago del Teide.

The heartbroken mother said she feared “something untoward” had happened to the teenager.

And a shocking new photo of the teenager showed him splashing around a crowded rave before disappearing on Sunday night.