Heat Killed 50,000 People in Europe’s Cities This Summer

Source reports published 23 Oct 2026, 10:00 am – 2:07 pm AEST

New research indicates that 50,000 people died of heat-related causes across Europe’s cities during the summer, marking the deadliest summer on record. The study attributes 65% of these deaths to anthropogenic climate change, highlighting the vulnerability of urban populations.

What happened

• Researchers estimated that 50,000 people died in European cities due to heat-related causes during the summer of 2026.
• The study, using historical relationships between heat and mortality in 854 cities, found that climate breakdown contributed to two in every three deaths.
• Hot days exacerbated existing health conditions, particularly in vulnerable populations like those over 85, with Naples experiencing the highest death rate per million residents.
• Emergency doctors reported a significant increase in hospital visits due to heat-exacerbated illnesses.
• The study revealed a rise in climate change’s contribution to heat deaths from approximately 40% to 65% since the beginning of the century.
• The EU’s climate monitoring service recorded more than half of the continent seared by "very strong" heat stress.
• Researchers estimated 4,500 excess deaths in the UK, with 2,500 more deaths than expected due to climate change.
• The summer of 2026 saw a succession of extreme heatwaves, particularly in western Europe, with temperatures about 2.9C above the 1991-2020 average.
• Scientists warned that rising temperatures will lead to more deaths than they save, and urged governments to reduce fossil fuel use and bolster health systems.

Original reporting

• Guardian: Heat killed ‘staggering’ 50,000 people in Europe’s cities this summer, scientists warn
  2026-10-23T00:00:00+00:00
• GB News: Over 50,000 people died of heat-related causes across Europe in 'deadliest Summer on record'
  2026-10-23T04:07:06+00:00