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Extreme heat kills hundreds, millions more sweltering worldwide

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                                A construction worker drinks water during a heatwave affecting the Northeast in Boston, Mass., on Wednesday.
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A construction worker drinks water during a heatwave affecting the Northeast in Boston, Mass., on Wednesday.

                                A construction worker drinks water during a heatwave affecting the Northeast in Boston, Mass., on Wednesday.

LONDON >> Deadly heatwaves are scorching cities on four continents as the Northern Hemisphere marks the first day of summer, a sign that climate change may again help to fuel record-breaking heat that could surpass last summer as the warmest in 2,000 years.

Record temperatures in recent days are suspected to have caused hundreds, if not thousands, of deaths across Asia and Europe.

In Saudi Arabia, nearly two million Muslim pilgrims are finishing the haj at the Grand Mosque in Mecca this week. But hundreds have died during the journey amid temperatures above 124 degrees Fahrenheit, according to reports from foreign authorities.

Egyptian medical and security sources told Reuters today that at least 530 Egyptians had died while participating — up from 307 reported as of yesterday. Another 40 remain missing.

Countries around the Mediterranean have also endured another week of blistering high temperatures that have contributed to forest fires from Portugal to Greece and along the northern coast of Africa in Algeria, according to the U.S. National Oceanic and Atmospheric Administration’s Earth Observatory.

In Serbia, meteorologists forecast temperatures of around 104 F this week as winds from North Africa propelled a hot front across the Balkans. Health authorities declared a red weather alert and advised people not to venture outdoors.

Belgrade’s emergency service said its doctors intervened 109 times overnight to treat people with heart and chronic health conditions.

In neighboring Montenegro, where health authorities also warned people to stay in the shade until late afternoon, tens of thousands of tourists sought refreshment on the beaches along its Adriatic coast.

Europe this year has been contending with a spate of dead and missing tourists amid dangerous heat. A 55-year-old American was found dead on the Greek island of Mathraki, police said on Monday — the third such tourist death in a week.

A broad swath of the eastern U.S. was also wilting for a fourth consecutive day under a heat dome, a phenomenon that occurs when a strong, high-pressure system traps hot air over a region, preventing cool air from getting in and causing ground temperatures to remain high.

New York City opened emergency cooling centers in libraries, senior centers and other facilities. While the city’s schools were operating normally, a number of districts in the surrounding suburbs sent students home early to avoid the heat.

Meteorological authorities also issued an excessive heat warning for parts of the U.S. state of Arizona, including Phoenix, today, with temperatures expected to reach 114 F.

In the nearby state of New Mexico, a pair of fast-moving wildfires abetted by the blistering heat have killed two people, burned more than 23,000 acres and destroyed 500 homes, according to authorities. Heavy rains could help temper the blazes, but thunderstorms today were also causing flash flooding and complicating firefighting efforts.

All told, nearly 100 million Americans were under extreme heat advisories, watches and warnings today, according to the federal government’s National Integrated Heat Health Information System.

The brutal temperatures should begin easing in New England on Friday, the weather service said, but New York and the mid-Atlantic states will continue to endure near-record heat into the weekend.


India’s summer period lasts from March to May, when monsoons begin slowly sweeping across the country and breaking the heat.

But New Delhi on Wednesday registered its warmest night in at least 55 years, with India’s Safdarjung Observatory reporting a temperature of 35.2 C (95.4 F) at 1 a.m.

Temperatures normally drop at night, but scientists say climate change is causing nighttime temperatures to rise. In many parts of the world, nights are warming faster than days, according to a 2020 study by the University of Exeter.

New Delhi has clocked 38 consecutive days with maximum temperatures at or above 40 C (104 F) since May 14, according to weather department data.

An official at the Indian health ministry said on Wednesday there were more than 40,000 suspected heatstroke cases and at least 110 confirmed deaths between March 1 and June 18, when northwest and eastern India recorded twice the usual number of heatwave days in one of the country’s longest such spells.

Gaining accurate death tolls from heatwaves, however, is difficult. Most health authorities do not attribute deaths to heat, but rather to illnesses exacerbated by high temperatures, such as cardiovascular issues. Authorities therefore undercount heat-related deaths by a significant margin — typically overlooking thousands if not tens of thousands of deaths.


The heatwaves are occurring against a backdrop of 12 consecutive months that have ranked as the warmest on record in year-on-year comparisons, according to the European Union’s climate change monitoring service.

The World Meteorological Organization says there is an 86% percent chance that one of the next five years will eclipse 2023 to become the warmest on record.

While overall global temperatures have risen by nearly 1.3 C (2.3 F) above pre-industrial levels, climate change is fuelling more extreme temperature peaks — making heatwaves more common, more intense and longer-lasting.

On average globally, a heatwave that would have occurred once in 10 years in the pre-industrial climate will now occur 2.8 times over 10 years, and it will be 1.2 C warmer, according to an international team of scientists with the World Weather Attribution (WWA) group.

Scientists say heatwaves will continue to intensify if the world continues to unleash climate-warming emissions from the burning of fossil fuels.

If the world hits 2 C (3.6 F) of global warming, heatwaves would on average occur 5.6 times in 10 years and be 2.6 C (4.7 F) hotter, according to the WWA.

Additional reporting by Aleksandar Vasovic in Belgrade, Pesha Magid in Riyadh, Shivam Patel in Delhi, Ahmed Mohamed Hassan in Cairo, Ali Withers in Copenhagen and Joseph Ax in New York.

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