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Bright skies, gentle breezes and a breathtaking vista of majestic peaks covered in snow - that is the autumn setting that trekkers on the world's highest peak have come to love.

However that appears to be shifting.

Changing Climate Conditions

Climate scientists say the rainy season now extends into fall, which is historically the high-altitude travel period.

Throughout this delayed tail end of monsoon, they have recorded at least one episode of extreme rainfall nearly every year for the past decade, with mountain conditions becoming more dangerous.

Recent Emergency on Everest

Last weekend, a shock snowstorm trapped hundreds of travelers near the eastern side of Mount Everest for multiple days in freezing conditions at an altitude of more than 4,900m.

Nearly six hundred trekkers were led to security by the end of that week, according to sources.

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

Similar Incidents Across the Region

This was on the Tibetan side but a comparable situation had occurred on the southern side, where a Korean mountaineer died on Mera Peak.

The world found out after some delay because communication lines were affected by heavy downpours and significant snow accumulation.

Authorities estimate that landslides and sudden floods in the region have claimed the lives of around sixty individuals over the past week.

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

Business Consequences

Considering autumn represents the preferred season, regular storms like these have "hampered our trekking and mountaineering industry," he continued.

The monsoon season in northern India and the Himalayan nation typically lasts from early summer to early autumn, but no longer.

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

Growing Weather Extremes

More concerning is the heavy precipitation and snow the concluding phase of the season brings, like it did recently on early October.

High in the Himalayas, such extreme conditions means blizzards and winter storms, which represents a significant danger for hiking, mountaineering and tourism.

Personal Experiences

Exactly what occurred last weekend when the conditions changed quite suddenly - the air currents began howling, mercury readings plummeted and sightlines decreased significantly.

The path that had comfortably led the hikers to what should have been a stunning pitstop was now buried in snow and extremely difficult to navigate.

Nevertheless, one trekker, who had hiked these mountains more than a twelve occasions, reported he had "never encountered weather like this" before.

Scientific Explanations

A primary big driver is the higher amount of moisture in the air because of how the planet has been heating up, scientists explain.

This has contributed to torrential rains over a brief period of time, frequently after a extended period without rain – in contrast to in the previous era when monsoon showers were spread uniformly over four months.

A Turbocharged Monsoon

Weather specialists report the monsoons in the region at times seem to have become more intense because they are more frequently coming into contact with an additional weather system, the western weather pattern.

This is a low pressure system that forms in the Mediterranean region and travels eastward - it transports chillier temperatures that causes precipitation and occasionally snowfall to the subcontinent, neighboring countries and the Himalayan region.

Climate Change Effects

Researchers have additionally found that in a warming planet, the growing relationship between westerly disturbances and monsoons is causing an additional unusual result.

The hotter air is forcing the weather systems to greater altitudes, which means these weather systems are now able to cross the Himalayas and reach Tibet and additional regions that did not see so much precipitation before.

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

"That means adaptable scheduling, immediate choices, and experienced guidance [in the Himalayas] have become even more essential."