Rescuers were called to three separate incidents on each of Yorkshire’s Three Peaks within six hours of each other.
The Clapham-based Cave Rescue Organisation used mobile phone technology to find two women lost on Pen-y-ghent yesterday.
The team was alerted at about 7.15pm after the walkers, aged 28 and 34, reported themselves completely lost in low cloud somewhere on the hill.
Volunteers were joined by a search dog and handler before they managed to get further information about the women’s location.
A spokesperson for the team said: “Eventually their location was pinpointed some 2km [1¼ miles] away at Cosh Water Gap above Birkwith by using their mobile phone’s GPS software.”
The pair were then helped to safety by team members.
Three-quarters of an hour before the Pen-y-ghent callout, the team’s help was requested when four teenagers got into difficulties in a thunderstorm on Whernside, Yorkshire’s highest hill.
CRO volunteers were called out at 6.30pm after two of the group made their way off the hill into Dentdale and raised the alarm.
The pair reported that one of their party, a 17-year-old, had injured his ankle and another 17-year-old boy was also on the hillside, too exhausted to carry on.
The walkers were unable to provide an accurate location for their companions, so the team mounted a search on the fellside and on paths above Dentdale.
After receiving more information, the rescuers narrowed the search area and the pair were found on Scale Gill Moss, about a kilometre west of Dent Head.
One of the boys was carried off the fell and the other helped to safety to Dent Head Viaduct where an ambulance was waiting.
Shortly after midnight, the team was alerted to a third incident, on Ingleborough.
A party of three cavers was reported overdue from a trip down Sunset Hole on the slopes of the fell.
CRO was alerted at about 12.45am and a small team was sent to investigate, but found the three men, aged 19, 25 and 32, heading back to their vehicle at Chapel-le-Dale.