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Bright skies, calm winds and a breathtaking view of Himalayan peaks covered in snow - this describes the autumn setting that hikers on Mount Everest have come to love.

However that seems to be shifting.

Shifting Weather Patterns

Climate scientists report the monsoon now stretches into fall, which is traditionally the high-altitude tourism season.

During this prolonged tail end of monsoon, they have documented at least one instance of extreme precipitation almost every year for the previous decade, with mountain conditions becoming more risky.

Latest Emergency on Everest

Recently, a sudden snowstorm stranded several hundred of tourists near the east-facing face of Everest for days in bitterly cold conditions at an altitude of more than 4,900m.

Nearly 600 trekkers were escorted to security by the end of Tuesday, according to sources.

A single individual had died from extreme cold and altitude sickness, but the remaining individuals were said to be in good condition.

Similar Events Across the Region

This was on the Tibetan side but something similar had unfolded on the southern side, where a South Korean climber lost his life on Mera Peak.

The international community found out after some delay because communication lines were disrupted by heavy downpours and heavy snowfall.

Authorities calculate that landslides and flash floods in the region have killed approximately 60 people over the past week.

"This is highly unusual for October during which we expect the skies to remain clear," stated Riten Jangbu Sherpa.

Economic Consequences

Considering autumn represents the favored period, regular extreme weather events like this have "hampered our mountaineering and climbing business," he added.

The monsoon season in the Indian subcontinent and the Himalayan nation usually continues from June to mid-September, but no longer.

"Our data demonstrates that the majority of the years in the past ten years have had monsoons continuing until the second week of October, which is certainly a change," said a senior meteorology expert.

Increasing Climate Extremes

Even more worrying is the heavy rain and snow the tail end of the period brings, like it occurred recently on 4 and 5 October.

At elevation in the mountain range, such severe weather translates to snowstorms and snowstorms, which represents a significant danger for hiking, mountaineering and the travel industry.

Personal Experiences

Exactly what occurred recently when the conditions changed quite abruptly - the air currents began roaring, mercury readings plummeted and sightlines decreased significantly.

The trail that had comfortably brought the hikers to what was expected to be a stunning pitstop was now covered in snow and impossible to traverse.

Still, one hiker, who had climbed these mountains more than a twelve occasions, reported he had "never encountered weather like these" before.

Scientific Analysis

A primary big factor is the higher quantity of humidity in the air because of how the planet has been warming, researchers say.

This has led to torrential rains over a short span of time, often after a extended dry spell – unlike in the past when seasonal rains were spread uniformly over the entire season.

A Intensified Monsoon

Climate specialists report the monsoons in the region at times appear to have become more intense because they are more frequently interacting with an additional weather system, the westerly disturbance.

This is a low pressure system that forms in the Mediterranean region and moves east - it transports chillier temperatures that causes rains and occasionally snowfall to northern India, Pakistan and Nepal.

Global Change Impacts

Scientists have also discovered that in a warming world, the growing relationship between western weather systems and seasonal rains is causing another atypical outcome.

The hotter atmosphere is pushing the weather systems higher, which means these atmospheric conditions are now capable to pass over the Himalayas and reach Tibet and other regions that did not see as much rain before.

"The transformation is the reliability of patterns; we can't assume that situations will behave the identical from season to season," commented an experienced expedition leader.

"That means adaptable planning, real-time decision-making, and experienced leadership [in the Himalayas] have become even more crucial."