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  1. This is the hidden content, please
  2. This is the hidden content, please
  3. Europe’s Scorching Summer
 
Output from NASA’s GEOS (Goddard Earth Observing System) global model shows daily maximum surface air temperature across Western Europe from May 1 to August 19, 2026. The darkest red areas indicate temperatures that met or exceeded 40°C (104°F).
NASA Earth Observatory/Lauren Dauphin

Western Europe got its first hint of an unusual summer in May 2026, when a heat dome produced

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that shattered records in several countries. Remarkable as it was, that early
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turned out to be only the opening salvo.

By mid-August, Europeans were sweating through their

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of the season, with the latest onslaught pushing temperatures well above 40 degrees Celsius (104 degrees Fahrenheit) across a broad area. During these bouts of extreme weather, high temperatures were often unrelenting, persisting for several days and sometimes weeks on end, and remaining overnight.

For a region accustomed to relatively mild summers, the heat upended everyday life. Hospitalizations and heat-related deaths

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. Highways and train tracks
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, forcing road closures and
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. Large and destructive wildfires
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in areas where they were once rarely seen. The heat also worsened the
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that has gripped the region for months, contributing to
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river water levels and disrupting water and power supplies, transportation routes, and agriculture.

The animation above shows the daily maximum surface air temperature across Western Europe from May 1 to August 19, 2026. It was produced by combining satellite observations with temperatures predicted by a version of NASA’s

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(Goddard Earth Observing System) global model, which uses mathematical equations to represent physical processes in the atmosphere. The darkest red areas indicate where temperatures met or exceeded 40°C.

The heat broke records at a furious pace, often by wide margins. According to the

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, temperatures soared as high as 35.1°C (95.2°F) in London on May 26, smashing the previous May record by 2.3°C (4.1°F). In June, Bordeaux, France, broke its maximum-temperature record on three consecutive days, hitting 42.5°C on June 24,
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. Slovakia, meanwhile, set new national records for both
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and
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in August. Combined June and July temperatures in Western Europe were the highest on record,
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to Europe’s Copernicus climate monitoring service.

In Europe, extreme temperatures collided with several vulnerabilities, including limited access to

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, high nighttime temperatures, and a lack of green space in some cities. The circumstances triggered not just discomfort but
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and
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in some cases. Preliminary reports suggest that heat may have been associated with
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, including thousands of people in the
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,
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,
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, and
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.

“Air conditioning is an especially critical issue in Europe in the short term,” said Anamika Shreevastava, a researcher at New York University who

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as a postdoc at NASA’s Jet Propulsion Laboratory. One of her goals was to produce
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based on NASA data from missions like
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that city planners could use to make cities more resilient to heat waves.

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show that 23 percent of homes in Europe have air conditioning, compared to 90 percent of homes in the United States. That difference contributes to the much higher death rates that researchers
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in European cities during heat waves than in comparable American cities. “Longer term, cities can also plant trees, expand parks, use reflective roof paint, and transition to building materials less likely to retain heat,” Shreevastava said.

An analysis from the

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indicates that heat stress is the world’s leading cause of weather-related deaths, noting it exacerbates underlying illnesses, including cardiovascular disease, diabetes, mental health conditions, and asthma. Researchers have calculated that roughly 489,000 heat-related deaths occur each year, with 45 percent of the deaths in Asia and 36 percent in Europe.

“For older adults with physical health problems, temperatures as low as 26.7°C (80°F) can pose significant danger,” said Deborah Carr, a Boston University sociologist who specializes in the study of aging. “Nighttime heat is especially harmful for older adults whose homes lack air conditioning.”

Carr is part of a research team that used demographic data, along with 

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 archived by NASA,
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which parts of the world are at the greatest risk of current and future heat exposure. Southern Europe was among the areas facing growing heat exposure and an aging population, the researchers found.

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, published in
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in August 2026, underscores the importance of demographics in assessing the risks posed by heat. This study, led by Stanford researcher Qinqin Kong, mapped where increasing heat is likely to lead to intolerable conditions in the coming decades for young, middle-aged, and older adults, concluding that safe thresholds will be breached often and widely, with risks falling disproportionately on older people.

“The human body can tolerate only a limited range of ambient heat,” said Kong, a recipient of a

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. “Understanding where, when, and to what extent these limits are exceeded is critical.”

With intolerable levels of heat expected to affect more people across larger regions and for longer periods than previously thought, Kong and his colleagues hope that their findings will inform targeted heat action plans, emergency preparedness, and health system planning.

NASA Earth Observatory image by Lauren Dauphin, using 

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 data from the 
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 at NASA GSFC.
Story by Adam Voiland.

References & Resources

  • AP (2026, August 10)
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    . Accessed August 20, 2026.
  • Copernicus Climate Change Service (2026, August 12)
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    . Accessed August 20, 2026.
  • Copernicus Climate Change Service (2026, July 9
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    . Accessed August 20, 2026.
  • Falchetta, G., et al. (2024)
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    . Nature Communications, 15, 3678.
  • Kong, Q., et al. (2026)
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    . The Lancet Planetary Health, In press.
  • Met Office (2026, June 17)
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    . Accessed August 20, 2026.
  • NASA (2025)
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    . Accessed August 20, 2026.
  • NASA Earthdata (2022)
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    . Accessed August 20, 2026.
  • NASA Earthdata,
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    . Accessed August 20, 2026.
  • The New York Times (2026, August 14)
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    . Accessed August 20, 2026.
  • Reuters (2026)
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    . Accessed August 20, 2026.
  • World Meteorological Organization (2026, August 12)
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    . Accessed August 20, 2026.
  • World Resources Institute (2026, June 30)
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    .  Accessed August 20, 2026.

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