Three more climbers have died on Mount Everest, taking the death toll to seven in a week - more than the total for the whole of past year.
An American and Indian climber are the latest fatalities, their expedition organizers said, on one of the busiest-ever days on the 8,848-meter (29,029-foot) peak.
Garrett Madison of the US based Madison Mountaineering company that sponsors climbers to Mount Everest said many were not "well qualified or prepared climbers" and were without the support necessary to ascend and descend safely.
"Before you reach the summit, you have to wait and every minute counts at the height", she said.
Lhakpa Sherpa, from tour agency Arun Treks and Expeditions, said Ms Kulkarni died of weakness while coming down to Camp IV on the South Col of Everest. "Sherpa guides carried him down to Camp 4 but he breathed his last there", Keshav Paudel of Peak Promotion said of Bagwan to AFP.
The AFP reported that Nepal issued a record 381 $US11,000 ($15,974) permits to hopeful mountaineers this spring in the country.
In a traffic jam, exhausted climbers are often forced to wait several hours for their turn to ascend or descend on a single rope, thereby increasing their chances of exhaustion, frostbite or altitude sickness.
An astounding picture posted on Facebook showed just how long the line to get up the mountain was.
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Sherpa guides immediately gave him CPR and extra oxygen.
"There are explanations for the increase in traffic of climbers on Mount Everest", said Danduraj Ghimire, chief of Nepal's department of tourism.
Cash wrote that all he had left at the time was Mt. Vinson Masiff in Antarctica, which he climbed in January, and Everest.
Cash was a Utah climber with a long-held dream to climb the highest mountains on the planet's seven continents, daughter Danielle Cook said.
Kevin Hynes is the second Irish climber to lose his life on Mount Everest in the past week after the death of Seamus Lawless from Wicklow.
It is peak season for many Himalayan mountains and outside of Everest nine climbers have died on other 8,000-metre-plus peaks, while one is missing.
There have been 12 confirmed deaths this climbing season in the Himalayan region, according to Shrestha, including three on Everest. It noted previous warnings about a rush to the top should lengthy periods of poor weather be punctuated with good days.
There are 41 teams with a total of 378 climbers permitted to scale the mountain during the spring climbing season in Nepal that begins around March and ends this month.