European heat wave: what is the cause? Is climate change to blame?

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Europe is currently in the midst of a heat wave. Italy, in particular, is set to face scorching heat, with temperatures expected to reach 4045C. There is even a chance that the current European temperature record of 48.8°C, set in Sicily in 2021, will be exceeded.

The scorching temperatures have spread to other countries in southern and eastern Europe, including France, Spain, Poland and Greece. The heat will complicate travel plans for those heading to popular vacation destinations in the region.

Heat waves, which are defined as prolonged periods of unusually hot weather in a specific location, can be extremely dangerous. Europe has had its fair share of devastating heat waves in the past.

In 2003, a heat wave swept through Europe, claiming the lives of more than 70,000 people. Then, in 2022, another heat wave hit Europe, killing nearly 62,000 people. The current heat wave is caused by an anticyclone named Cerberus after the three-headed monster-dog that guards the gates of the underworld in Greek mythology. . An anticyclone or anticyclonic system is a normal weather phenomenon in which air descending from the upper atmosphere brings about a period of dry, stable weather with limited cloud formation and little wind.

High pressure systems tend to move slowly, which is why they persist for days or even weeks at a time. They often become semi-permanent features over large tracts of land.

When high-pressure systems form over hot land, in regions like the Sahara, the stability of the system generates even hotter temperatures because the already hot air is heated even more.

Read also: 56% of ocean waters have changed color due to climate change: study

Eventually the high will weaken or collapse and the heat wave will end. According to the Italian Meteorological Society, the Cerberus heat wave is expected to persist for about two weeks.

What role does climate change play?

Anticyclonic systems, such as the one currently affecting Europe, have extended northward in recent years. It is difficult to attribute a single event, such as a heat wave, directly to climate change. But as temperatures continue to warm, we are seeing changes in atmospheric circulation patterns that may lead to increased occurrences of extreme temperatures and drought in Europe.

Research by the Intergovernmental Panel on Climate Change confirms this trend. His data shows an increase in the frequency and magnitude of extreme weather events since the 1950s. A separate analysis of European heat waves revealed an increasing severity of such events over the past two decades.

In the summer of 2022, southern Europe experienced higher than usual temperatures for this time of year. Spain, France and Italy saw daily maximum temperatures exceed 40°C.

The EU’s Copernicus Climate Change Service attributed these unusually warm conditions to climate change and suggested that such events are likely to become more frequent, intense and longer in the future, indicating a worrying trend that could continue this year.

The Dangers of Extreme Heat Heat waves and extreme temperatures affect human health in many ways. These conditions can cause heat stroke, leading to symptoms such as headaches and dizziness. Dehydration resulting from heat can also affect respiratory and cardiovascular performance.

Heat-related health incidents have already been reported in Europe during the ongoing heat wave. An Italian road worker has died and numerous cases of heatstroke have been reported in Spain and Italy.

Italy’s health ministry has advised residents and visitors to affected areas to take precautions like staying out of the sun during the hottest part of the day, staying hydrated and avoiding alcohol consumption.

But the effects of heat waves go beyond individual health. They also have wider social and economic consequences. Extreme heat can damage road surfaces and even cause railroad tracks to warp.

Read also: Climate change makes trees bigger, but also weaker: study

Heat waves can also lead to reduced water availability, affecting electricity generation, crop irrigation and drinking water supply.

In 2022, scorching heat prevented French nuclear power plants from operating at full capacity, as higher river temperatures and low water levels affected their cooling capacity. Research indicates that extreme heat has already had a negative impact on economic growth in Europe, reducing it by up to 0.5% over the past decade.

As temperatures continue to rise, heat waves will become more severe. It is crucial that governments around the world take swift and decisive action to immediately reduce greenhouse gas emissions.

However, it is important to note that even if we were to completely halt global greenhouse gas emissions today, the climate would still be hot. This is due to the heat that is already absorbed and retained by the oceans. Although we may slow the rate of global warming, the effects of climate change will continue to be felt in the future.

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