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Clear heavens, gentle breezes and a panoramic vista of Himalayan summits draped in white powder - this describes the autumn experience that hikers on the world's highest peak have grown to adore.

However this seems to be changing.

Changing Weather Patterns

Meteorologists report the monsoon now extends into autumn, which is traditionally the mountain tourism period.

Throughout this delayed tail end of monsoon, they have recorded at least one occurrence of heavy precipitation almost every year for the past decade, with mountain weather becoming more risky.

Recent Emergency on Everest

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

Almost six hundred hikers were led to safety by the conclusion of Tuesday, according to reports.

One person had died from extreme cold and altitude sickness, but the remaining individuals were reportedly in good health.

Comparable Events Across the Region

This was on the Tibetan side but something similar had unfolded on the southern side, where a Korean mountaineer lost his life on another Himalayan summit.

The international community found out after some delay because communications were disrupted by torrential rains and significant snow accumulation.

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

"It is highly unusual for October during which we anticipate the weather to stay clear," stated an experienced mountain guide.

Economic Impact

Considering autumn represents the favored season, regular extreme weather events like these have "affected our trekking and mountaineering industry," he continued.

The rainy period in northern India and Nepal typically lasts from June to early autumn, but not anymore.

"Our data demonstrates that the majority of the years in the past ten years have had rainy seasons continuing until the second week of autumn, which is certainly a shift," explained a high-ranking meteorology expert.

Increasing Weather Severity

Even more concerning is the intense precipitation and snow the tail end of the period produces, like it occurred this time on early October.

High in the mountain range, such extreme conditions means blizzards and winter storms, which represents a huge danger for trekking, mountaineering and tourism.

Personal Accounts

Exactly what occurred recently when the weather shifted very suddenly - the winds began roaring, temperatures plummeted and sightlines decreased significantly.

The trail that had comfortably brought the trekkers to what should have been a stunning pitstop was now covered in white accumulation and impossible to navigate.

Still, one trekker, who had hiked these mountains more than a twelve times, reported he had "not once experienced weather like these" before.

Scientific Analysis

A primary big factor is the higher amount of humidity in the air because of how the world has been warming, researchers explain.

That has contributed to torrential rains over a short span of time, frequently after a extended period without rain – in contrast to in the past when monsoon showers were spread uniformly over four months.

A Turbocharged Monsoon

Weather experts report the monsoons in South Asia at times appear to have become stronger because they are more frequently interacting with another weather system, the western weather pattern.

The phenomenon is a low pressure system that forms in the Mediterranean region and moves east - it carries cold air that causes precipitation and occasionally snow to the subcontinent, neighboring countries and Nepal.

Climate Warming Effects

Scientists have also discovered that in a heating planet, the growing relationship between western weather systems and monsoons is causing another atypical result.

The hotter atmosphere is pushing the clouds higher, which indicates these atmospheric conditions are now able to cross the Himalayas and reach the Tibetan plateau and other areas that did not see as much precipitation before.

"The transformation is the predictability of weather patterns; we can't assume that conditions will behave the identical from season to season," said an seasoned mountain leader.

"That means adaptable scheduling, real-time decision-making, and experienced guidance [in the Himalayas] have become increasingly essential."