United Nations:

Humanity is suffering from an “extreme heat epidemic,” UN Secretary-General Antonio Guterres warned Thursday, calling for action to limit the impacts of heat waves intensified by climate change.

“Billions of people are facing an extreme heat epidemic — wilting under increasingly deadly heat waves, with temperatures topping 50 degrees Celsius around the world,” he said. “That’s 122 degrees Fahrenheit. And halfway to boiling.”

According to the European Copernicus network, July 21, 22 and 23 were the three hottest days ever recorded worldwide, with July 22 holding the absolute record of 17.16 degrees Celsius (62.9 degrees Fahrenheit).

Guterres repeated his call for humanity to fight its “addiction” to fossil fuels.

“Today, our focus is on the impact of extreme heat. But let’s not forget that there are many other devastating symptoms of the climate crisis: ever-more fierce hurricanes. Floods. Droughts. Wildfires. Rising sea levels. And the list goes on,” he said.

“To tackle all these symptoms, we need to fight the disease. And the disease is the madness of incinerating our only home. The disease is the addiction to fossil fuels. The disease is climate inaction,” he stressed, calling in particular on G20 countries to take action.

While 2023 was the hottest year on record, and 2024 could set a new record, temperatures well above 40C (104F) are increasingly common.

In the space of a year, the 50C threshold has even been exceeded in at least 10 places, from Death Valley in the United States (53.9C on July 7) to Agadir in Morocco, and also in China and India.

The intense heat, often less visible than other devastating impacts of climate change such as storms or floods, is nonetheless more deadly.

This “silent killer” is responsible for around 489,000 deaths per year between 2000 and 2019, compared with 16,000 deaths per year from cyclones, according to the UN’s “Call to Action” document published on Thursday.

Workers exposed

Extremely high temperatures also have an economic impact, with the UN estimating economic losses from heat stress at work will reach $2.4 trillion in 2030.

According to a report by the International Labor Organization published on Thursday, more than 70 percent of workers were exposed to excessive heat in 2020, 8.8 percent more than in 2000.

“The good news is that we can save lives and we can limit its impact,” Guterres said Thursday.

The UN has called for the world community to first act to protect “the most vulnerable” — including young children, the elderly and also humanity’s poorest.

In this context, early warning systems should include extreme heat, warning populations of the arrival of heat waves and informing them of the precautions to take, the document says.

The call to action also recommends an “increase (to) equitable access to and scale up (of) low-carbon cooling.”

This would involve investing in passive cooling systems — which include climate-sensitive urban design measures, reflective surfaces and natural cooling systems — and the phase-out of climate-warming gases that are used in many cooling systems.

(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)

Labourers sleep on the roadside during an early hot summer morning in Karachi, Pakistan. Pakistan port city Karachi and some other parts of the country continued to experience heatwave these days. File
| Photo Credit: AP

The world experienced an average of 26 more days of extreme heat over the last 12 months that would probably not have occurred without climate change, a report said on May 28.

Heat is the leading cause of climate-related death and the report further points to the role of global warming in increasing the frequency and intensity of extreme weather around the world.

For this study, scientists used the years 1991 to 2020 to determine what temperatures counted as within the top 10 per cent for each country over that period.

Next, they looked at the 12 months to May 15, 2024, to establish how many days over that period experienced temperatures within — or beyond — the previous range.

Then, using peer-reviewed methods, they examined the influence of climate change on each of these excessively hot days.

They concluded that “human-caused climate change added — on average, across all places in the world — 26 more days of extreme heat than there would have been without it”.

The report was published by the Red Cross Red Crescent Climate Centre, the World Weather Attribution scientific network and the nonprofit research organisation Climate Central.

2023 was the hottest year on record, according to the European Union’s climate monitor, Copernicus.

Already this year, extreme heatwaves have afflicted swathes of the globe from Mexico to Pakistan.

The report said that in the last 12 months, some 6.3 billion people — roughly 80% of the global population — experienced at least 31 days of what is classed as extreme heat.

In total, 76 extreme heatwaves were registered in 90 different countries on every continent except Antarctica.

Five of the most affected nations were in Latin America.

The report said that without the influence of climate change, Suriname would have recorded an estimated 24 extreme heat days instead of 182; Ecuador 10 not 180; Guyana 33 not 174, El Salvador 15 not 163; and Panama 12 not 149.

“[Extreme heat] is known to have killed tens of thousands of people over the last 12 months but the real number is likely in the hundreds of thousands or even millions,” the Red Cross said in a statement.

“Flooding and hurricanes may capture the headlines but the impacts of extreme heat are equally deadly,” said Jagan Chapagain, secretary general of the International Federation of the Red Cross.