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Clear heavens, calm breezes and a breathtaking view of Himalayan summits covered in white powder - that is the fall experience that hikers on the world's highest peak have grown to adore.

However this appears to be changing.

Changing Climate Conditions

Meteorologists indicate the monsoon now extends into fall, which is historically the mountain travel season.

During this prolonged conclusion of monsoon, they have documented at least one instance of extreme precipitation almost every year for the previous ten years, with mountain conditions becoming more dangerous.

Latest Emergency on Everest

Recently, a shock snowstorm stranded several hundred of travelers near the east-facing side of Mount Everest for days in bitterly cold conditions at an altitude of more than 16,000ft.

Approximately 600 trekkers were escorted to safety by the end of that week, according to sources.

A single person had succumbed from hypothermia and altitude sickness, but the remaining individuals were reportedly in stable condition.

Similar Events Across the Region

This was on the northern slope but something similar had occurred on the southern slope, where a Korean mountaineer died on Mera Peak.

The world learned much later because communications were disrupted by torrential rains and heavy snowfall.

Officials calculate that mudslides and sudden floods in the country have claimed the lives of around sixty people over the past seven days.

"It is highly atypical for October when we anticipate the skies to stay clear," stated an experienced mountain guide.

Economic Impact

Considering this is the favored season, regular storms like these have "hampered our trekking and mountaineering business," he added.

The rainy period in northern India and Nepal usually continues from June to mid-September, but no longer.

"Our data demonstrates that most of the years in the previous decade have had monsoons lasting until the middle of autumn, which is certainly a shift," said a high-ranking meteorology official.

Increasing Weather Extremes

More concerning is the intense precipitation and snowfall the concluding phase of the period produces, like it occurred this time on 4 and 5 October.

High in the Himalayas, such severe weather translates to blizzards and winter storms, which represents a huge risk for hiking, climbing and tourism.

Personal Experiences

That's what happened last weekend when the conditions shifted very abruptly - the winds began howling, mercury readings plummeted and sightlines dropped drastically.

The road that had comfortably brought the trekkers to what was expected to be a stunning pitstop was now buried in white accumulation and impossible to navigate.

Still, one hiker, who had hiked the Himalayas more than a dozen occasions, reported he had "never encountered conditions like this" before.

Expert Analysis

One big driver is the higher quantity of moisture in the atmosphere because of how the planet has been warming, scientists explain.

That has led to heavy precipitation over a brief period of duration, frequently after a extended period without rain – in contrast to in the past when seasonal rains were spread uniformly over four months.

A Turbocharged Monsoon

Climate experts say the rainy seasons in South Asia at occasions appear to have become stronger because they are increasingly coming into contact with an additional atmospheric phenomenon, the western weather pattern.

The phenomenon is a low pressure system that originates in the Mediterranean area and travels east - it carries chillier temperatures that brings rains and occasionally snowfall to the subcontinent, Pakistan and the Himalayan region.

Global Change Impacts

Researchers have also discovered that in a heating planet, the increasing interaction between westerly disturbances and seasonal rains is producing another atypical result.

The hotter atmosphere is pushing the clouds higher, which means these atmospheric conditions are now capable to cross the Himalayas and reach the Tibetan plateau and additional areas that previously experienced less as much precipitation before.

"The transformation is the reliability of patterns; we cannot presume that situations will behave the same from year to year," said an seasoned mountain guide.

"That means flexible scheduling, real-time choices, and knowledgeable leadership [in the Himalayas] have become increasingly important."