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Summer has not yet arrived, but the heat in Europe is already unbearable, with Spain, France, Italy and other countries experiencing days of intense heat, with temperatures in some areas even hitting their highest temperatures in the same period on record. At the same time, large-scale wildfires broke out in Spain and Germany, making the situation worse.
In the United States, the situation is not optimistic. Over the past week, more than 100 million Americans have been told to stay indoors, a record ever. The heat has killed several people and killed thousands of cattle. More worryingly, the U.S. Weather Service predicts that 240 million people will face scorching temperatures above 32 degrees Celsius in the coming week.
The Middle East has also been hit by heat, with temperatures in Kuwait and Iraq rising to 52 degrees Celsius. India has been gripped by heat since March, and even while Germany was still cold, India had set a record for the highest temperature in the same period in 122 years, reaching 33.1 degrees Celsius. With the onset of summer, India's temperatures will only climb further.
China has also not been spared the heat. Not long ago, Zhengzhou, located in the Central Plains, became China's first provincial capital, and the temperature exceeded the 40 degree Celsius mark. Surface temperatures in parts of Henan even rose to 74.1 degrees Celsius at one point, making it impossible to imagine the peculiar sight of frying eggs in this sweltering heat.
In the context of global high temperature, we have to think deeply, what causes the high temperature phenomenon on a global scale? How will this affect human life and the future? Are humans well prepared for increasingly frequent extreme weather?
The explanation given by scientists for global heat is not surprising: this year's sustained high temperatures are closely related to global warming caused by human activities.
Scientists have been warning about the dangers of global warming for years, but there are still some people, such as former US President Donald Trump, who believe that the so-called global warming is only fiction, and yet the facts have already proved their views untenable.
In addition to the high temperature problem, we also need to pay attention to the global food crisis. Although the Russian-Ukrainian conflict has exacerbated this problem, in fact, the root causes of the food crisis go far beyond that. The Indian government announced in May that it would ban wheat exports in order to ensure domestic food security. India's decision, the world's second-largest wheat producer, has raised global alarm.
Not long ago, the Indian government confidently declared that this year's wheat production will hit a record high of 111 million tons. However, as the high temperatures in March and April continued, problems arose in India's wheat-producing regions, which eventually led the Indian government to retract its previous rhetoric.
India is not the only country with a ban on food exports. As of May 28, more than 20 countries around the world, including Argentina, Kazakhstan, Indonesia, Malaysia, Morocco, Turkey and Hungary, have imposed food export restrictions, covering wheat, corn, flour, tomatoes, vegetable oils and pulses. As recently as June 1, Malaysia even suspended chicken exports.
High temperatures pose a huge threat to food yields, with yields of major food crops such as rice, wheat and maize likely to decrease by 3-8% for every 1 degree Celsius increase. The World Food Policy Research Institute said in a statement in May that global food production has fallen by 30 percent since 2007 due to the effects of climate change, and this trend is likely to worsen.
However, high temperatures are not only a threat to food production, it is also a great challenge to human survival. In the case of extreme heat, the survival of humanity will be threatened. When the ambient temperature exceeds the normal body temperature of humans, humans usually dissipate heat by sweating, which is a physiological principle of evaporation and heat absorption. But when humans are exposed to high temperatures for a long time, they are in danger.
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