On Wednesday, a pair of veteran Sherpas each set a record for Mount Everest climbs.
Ang Kami Sherpa's 22nd ascent to the summit created a new record for the most visits to the peak of Everest, Reuters reported.
Lhakpa Sherpa, 44, broke her own record by climbing Everest for the ninth time - the highest number of ascents by a woman.
The 48-year-old reached the 8,850-meter (29,035-foot) summit via the Southeast Ridge route, accompanied by 13 other climbers including his clients, Tourism Department official Gyanendra Shrestha said from the base camp.
Without having any formal training on mountain climbing, Lhakpa, who grew up with 11 siblings, first climbed Mt Everest from Nepal side in 2000.
A total of 94 foreign climbers and Sherpas made it to the top of Everest on Wednesday alone.
"The icefall is obviously a unsafe place to be, especially later on in the season and with increased temperatures experienced in the Himalayas due to climate change", Phil Crampton of the climbing company Altitude Junkies told the Everest blogger Alan Arnette earlier this year.More news: Mariners' Cano may need surgery on broken hand
He and his team started their expedition on Tuesday evening.
Sherpa climbed the Everest for the 21st time in 2017. She lives most of the year in the US state of CT and has a son and two daughters. In her early days, she would help climbers by cooking form them and worked as a porter before she trained as a climber.
Kami Rita apparently hopes to reach 25 times before retiring.
This year, her climb was sponsored by the outfitter Black Diamond, who provided gear and monetary support.
The problems occurred during what is being described as the third "summit wave" of climbers pushing towards the summit in this pre-monsoon season, after the ropes were fixed from both the Nepalese and Tibetan sides of the mountain.
"The risks are higher when 99 percent of climbers are going up as tourists", said Reinhold Messner, an Italian climber who was the first to ascend Mount Everest without supplementary oxygen.