A mountain rescue team says anyone without crampons and ice-axe should stay off the high mountains of south Wales in current conditions.
Brecon Mountain Rescue Team made the plea after it was twice called out to Corn Du to help injured walkers.
The team said anyone without winter gear should stick to lower slopes.
As grough reported, the Brecon team was one of three which went to the aid of an injured 34-year-old woman on the 873m (2,864ft) mountain on Saturday.
The following day, the team was called out to the same mountain, along with colleagues from the Central Beacons, Western Beacons and Longtown teams.
A 28-year-old man from Pontyclun, Bridgend, slipped and broke two bones in his lower leg.
A spokesperson for Brecon MRT said: “Difficult weather conditions meant he could not initially be reached by the RAF search and rescue helicopter, from RMB Chivenor, in Devon.
“The rescuers had increasing concerns about the casualty’s condition and fortunately a break in the weather allowed the helicopter to reach the site and airlift the casualty to Prince Charles Hospital, Merthyr Tydfil.”
Mark Jones, deputy team leader of Brecon MRT, said: “The man was very cold when we arrived on scene despite being appropriately equipped for the current wintry conditions.
“We are very grateful to the RAF aircrew who assisted in the evacuation.
“Their excellent flying allowed us to get the casualty to hospital a couple of hours before we could have ourselves.
“Hypothermia is the greater threat with this kind of incident.
“He was treated on the hill by the same mountain rescue doctor and paramedics as the Saturday callout.
“We would call on anyone heading out into the mountains during this cold snap to be properly equipped with crampons, ice-axe or walking poles, warm weather gear, map, compass and torch. If you are unused to high-level walking it may be better to stick to the lower slopes.
“We also strongly advise walkers to carry several layers of spare clothing. While they may not be needed during a walk, in the event of an accident, a casualty could be sitting in the snow and ice for over an hour before search teams reach them.
“These extra clothes will delay the effects of hypothermia and could save a life.”