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Clear skies, calm breezes and a panoramic vista of majestic peaks draped in white powder - that is the fall setting that hikers on Mount Everest have come to love.

However this seems to be transforming.

Changing Climate Conditions

Climate scientists indicate the monsoon now extends into autumn, which is historically the mountain tourism period.

During this delayed conclusion of the rainy season, they have recorded at least one instance of heavy precipitation almost every year for the previous decade, with high-altitude weather becoming more dangerous.

Latest Crisis on Everest

Last weekend, a sudden blizzard stranded hundreds of visitors near the east-facing face of Mount Everest for days in freezing temperatures at an altitude of more than 4,900m.

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

One person had died from extreme cold and altitude sickness, but the remaining individuals were said to be in stable condition.

Similar Events Across the Region

This was on the Tibetan slope but a comparable situation had unfolded on the Nepal slope, where a South Korean mountaineer lost his life on another Himalayan summit.

The international community found out after some delay because communications were affected by torrential rains and heavy snowfall.

Officials estimate that landslides and flash floods in the region have claimed the lives of approximately sixty individuals over the previous week.

"It is very atypical for autumn when we anticipate the weather to stay calm," said Riten Jangbu Sherpa.

Economic Impact

Considering this is the favored season, regular extreme weather events like these have "affected our trekking and climbing industry," he added.

The rainy period in the Indian subcontinent and the Himalayan nation typically continues from early summer to mid-September, but no longer.

"Our data shows that most of the years in the previous decade have had rainy seasons lasting until the second week of autumn, which is certainly a change," explained a senior weather official.

Increasing Climate Severity

More worrying is the heavy rain and snowfall the tail end of the season produces, like it occurred this time on 4 and 5 October.

High in the mountain range, such extreme conditions means snowstorms and snowstorms, which constitutes a huge danger for trekking, climbing and the travel industry.

Personal Experiences

Exactly what happened recently when the weather changed very abruptly - the air currents began roaring, mercury readings plummeted and sightlines decreased significantly.

The road that had easily brought the hikers to what was expected to be a stunning resting point was now buried in white accumulation and impossible to traverse.

Still, one trekker, who had climbed these mountains more than a twelve times, said he had "never experienced weather like these" before.

Expert Explanations

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

That has led to heavy precipitation over a short span of duration, frequently after a prolonged period without rain – unlike in the past when monsoon showers were distributed uniformly over four months.

A Intensified Monsoon

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

The phenomenon is a low pressure system that originates in the Mediterranean area and moves east - it carries chillier temperatures that causes precipitation and sometimes snowfall to northern India, neighboring countries and Nepal.

Global Change Impacts

Researchers have additionally discovered that in a heating world, the growing interaction between western weather systems and monsoons is producing another atypical outcome.

The hotter air is pushing the weather systems higher, which indicates these atmospheric conditions are now capable to pass over the Himalayas and reach Tibet and other regions that did not see so much precipitation in the past.

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

"This implies adaptable scheduling, immediate choices, and knowledgeable leadership [in the Himalayas] have become even more important."